diff --git a/include/media/stagefright/Utils.h b/include/media/stagefright/Utils.h
index 8213af9..73940d3 100644
--- a/include/media/stagefright/Utils.h
+++ b/include/media/stagefright/Utils.h
@@ -18,6 +18,7 @@
 
 #define UTILS_H_
 
+#include <media/stagefright/foundation/AString.h>
 #include <stdint.h>
 #include <utils/Errors.h>
 #include <utils/RefBase.h>
@@ -45,6 +46,8 @@
 void convertMessageToMetaData(
         const sp<AMessage> &format, sp<MetaData> &meta);
 
+AString MakeUserAgent();
+
 }  // namespace android
 
 #endif  // UTILS_H_
diff --git a/media/libstagefright/Utils.cpp b/media/libstagefright/Utils.cpp
index 8ed07bf..b0df379 100644
--- a/media/libstagefright/Utils.cpp
+++ b/media/libstagefright/Utils.cpp
@@ -21,7 +21,7 @@
 #include "include/ESDS.h"
 
 #include <arpa/inet.h>
-
+#include <cutils/properties.h>
 #include <media/stagefright/foundation/ABuffer.h>
 #include <media/stagefright/foundation/ADebug.h>
 #include <media/stagefright/foundation/AMessage.h>
@@ -455,6 +455,21 @@
 #endif
 }
 
+AString MakeUserAgent() {
+    AString ua;
+    ua.append("stagefright/1.2 (Linux;Android ");
+
+#if (PROPERTY_VALUE_MAX < 8)
+#error "PROPERTY_VALUE_MAX must be at least 8"
+#endif
+
+    char value[PROPERTY_VALUE_MAX];
+    property_get("ro.build.version.release", value, "Unknown");
+    ua.append(value);
+    ua.append(")");
+
+    return ua;
+}
 
 }  // namespace android
 
diff --git a/media/libstagefright/chromium_http/support.cpp b/media/libstagefright/chromium_http/support.cpp
index 13ae3df..832e86d 100644
--- a/media/libstagefright/chromium_http/support.cpp
+++ b/media/libstagefright/chromium_http/support.cpp
@@ -36,8 +36,8 @@
 #include "include/ChromiumHTTPDataSource.h"
 
 #include <cutils/log.h>
-#include <cutils/properties.h>
 #include <media/stagefright/MediaErrors.h>
+#include <media/stagefright/Utils.h>
 #include <string>
 
 namespace android {
@@ -156,19 +156,7 @@
 ////////////////////////////////////////////////////////////////////////////////
 
 SfRequestContext::SfRequestContext() {
-    AString ua;
-    ua.append("stagefright/1.2 (Linux;Android ");
-
-#if (PROPERTY_VALUE_MAX < 8)
-#error "PROPERTY_VALUE_MAX must be at least 8"
-#endif
-
-    char value[PROPERTY_VALUE_MAX];
-    property_get("ro.build.version.release", value, "Unknown");
-    ua.append(value);
-    ua.append(")");
-
-    mUserAgent = ua.c_str();
+    mUserAgent = MakeUserAgent().c_str();
 
     set_net_log(new SfNetLog());
 
diff --git a/media/libstagefright/rtsp/ARTSPConnection.cpp b/media/libstagefright/rtsp/ARTSPConnection.cpp
index 161bd4f..3068541 100644
--- a/media/libstagefright/rtsp/ARTSPConnection.cpp
+++ b/media/libstagefright/rtsp/ARTSPConnection.cpp
@@ -20,13 +20,12 @@
 
 #include "ARTSPConnection.h"
 
-#include <cutils/properties.h>
-
 #include <media/stagefright/foundation/ABuffer.h>
 #include <media/stagefright/foundation/ADebug.h>
 #include <media/stagefright/foundation/AMessage.h>
 #include <media/stagefright/foundation/base64.h>
 #include <media/stagefright/MediaErrors.h>
+#include <media/stagefright/Utils.h>
 
 #include <arpa/inet.h>
 #include <fcntl.h>
@@ -41,6 +40,10 @@
 // static
 const int64_t ARTSPConnection::kSelectTimeoutUs = 1000ll;
 
+// static
+const AString ARTSPConnection::sUserAgent =
+    StringPrintf("User-Agent: %s\r\n", MakeUserAgent().c_str());
+
 ARTSPConnection::ARTSPConnection(bool uidValid, uid_t uid)
     : mUIDValid(uidValid),
       mUID(uid),
@@ -50,7 +53,6 @@
       mConnectionID(0),
       mNextCSeq(0),
       mReceiveResponseEventPending(false) {
-    MakeUserAgent(&mUserAgent);
 }
 
 ARTSPConnection::~ARTSPConnection() {
@@ -1032,27 +1034,12 @@
 #endif
 }
 
-// static
-void ARTSPConnection::MakeUserAgent(AString *userAgent) {
-    userAgent->clear();
-    userAgent->setTo("User-Agent: stagefright/1.1 (Linux;Android ");
-
-#if (PROPERTY_VALUE_MAX < 8)
-#error "PROPERTY_VALUE_MAX must be at least 8"
-#endif
-
-    char value[PROPERTY_VALUE_MAX];
-    property_get("ro.build.version.release", value, "Unknown");
-    userAgent->append(value);
-    userAgent->append(")\r\n");
-}
-
 void ARTSPConnection::addUserAgent(AString *request) const {
     // Find the boundary between headers and the body.
     ssize_t i = request->find("\r\n\r\n");
     CHECK_GE(i, 0);
 
-    request->insert(mUserAgent, i + 2);
+    request->insert(sUserAgent, i + 2);
 }
 
 }  // namespace android
diff --git a/media/libstagefright/rtsp/ARTSPConnection.h b/media/libstagefright/rtsp/ARTSPConnection.h
index 68f2d59..1fe9c99 100644
--- a/media/libstagefright/rtsp/ARTSPConnection.h
+++ b/media/libstagefright/rtsp/ARTSPConnection.h
@@ -74,6 +74,8 @@
 
     static const int64_t kSelectTimeoutUs;
 
+    static const AString sUserAgent;
+
     bool mUIDValid;
     uid_t mUID;
     State mState;
@@ -89,8 +91,6 @@
 
     sp<AMessage> mObserveBinaryMessage;
 
-    AString mUserAgent;
-
     void performDisconnect();
 
     void onConnect(const sp<AMessage> &msg);
@@ -122,8 +122,6 @@
     static bool ParseSingleUnsignedLong(
             const char *from, unsigned long *x);
 
-    static void MakeUserAgent(AString *userAgent);
-
     DISALLOW_EVIL_CONSTRUCTORS(ARTSPConnection);
 };
 
diff --git a/media/libstagefright/rtsp/MyHandler.h b/media/libstagefright/rtsp/MyHandler.h
index 95ed43a..e067e20 100644
--- a/media/libstagefright/rtsp/MyHandler.h
+++ b/media/libstagefright/rtsp/MyHandler.h
@@ -28,13 +28,13 @@
 #include "ASessionDescription.h"
 
 #include <ctype.h>
-#include <cutils/properties.h>
 
 #include <media/stagefright/foundation/ABuffer.h>
 #include <media/stagefright/foundation/ADebug.h>
 #include <media/stagefright/foundation/ALooper.h>
 #include <media/stagefright/foundation/AMessage.h>
 #include <media/stagefright/MediaErrors.h>
+#include <media/stagefright/Utils.h>
 
 #include <arpa/inet.h>
 #include <sys/socket.h>
@@ -56,19 +56,6 @@
 
 namespace android {
 
-static void MakeUserAgentString(AString *s) {
-    s->setTo("stagefright/1.1 (Linux;Android ");
-
-#if (PROPERTY_VALUE_MAX < 8)
-#error "PROPERTY_VALUE_MAX must be at least 8"
-#endif
-
-    char value[PROPERTY_VALUE_MAX];
-    property_get("ro.build.version.release", value, "Unknown");
-    s->append(value);
-    s->append(")");
-}
-
 static bool GetAttribute(const char *s, const char *key, AString *value) {
     value->clear();
 
@@ -279,8 +266,7 @@
 
         data[offset++] = 6;  // TOOL
 
-        AString tool;
-        MakeUserAgentString(&tool);
+        AString tool = MakeUserAgent();
 
         data[offset++] = tool.size();
 
diff --git a/media/libstagefright/wifi-display/source/WifiDisplaySource.cpp b/media/libstagefright/wifi-display/source/WifiDisplaySource.cpp
index f2e659a..792a9c5 100644
--- a/media/libstagefright/wifi-display/source/WifiDisplaySource.cpp
+++ b/media/libstagefright/wifi-display/source/WifiDisplaySource.cpp
@@ -34,6 +34,7 @@
 #include <media/stagefright/foundation/ADebug.h>
 #include <media/stagefright/foundation/AMessage.h>
 #include <media/stagefright/MediaErrors.h>
+#include <media/stagefright/Utils.h>
 
 #include <arpa/inet.h>
 #include <cutils/properties.h>
@@ -42,6 +43,9 @@
 
 namespace android {
 
+// static
+const AString WifiDisplaySource::sUserAgent = MakeUserAgent();
+
 WifiDisplaySource::WifiDisplaySource(
         const sp<ANetworkSession> &netSession,
         const sp<IRemoteDisplayClient> &client,
@@ -1559,7 +1563,7 @@
     response->append(buf);
     response->append("\r\n");
 
-    response->append("Server: Mine/1.0\r\n");
+    response->append(StringPrintf("Server: %s\r\n", sUserAgent.c_str()));
 
     if (cseq >= 0) {
         response->append(StringPrintf("CSeq: %d\r\n", cseq));
diff --git a/media/libstagefright/wifi-display/source/WifiDisplaySource.h b/media/libstagefright/wifi-display/source/WifiDisplaySource.h
index 3a1b0f9..3efa0b4 100644
--- a/media/libstagefright/wifi-display/source/WifiDisplaySource.h
+++ b/media/libstagefright/wifi-display/source/WifiDisplaySource.h
@@ -113,6 +113,8 @@
     static const int64_t kPlaybackSessionTimeoutUs =
         kPlaybackSessionTimeoutSecs * 1000000ll;
 
+    static const AString sUserAgent;
+
     State mState;
     VideoFormats mSupportedSourceVideoFormats;
     sp<ANetworkSession> mNetSession;