diff --git a/camera/CameraParameters.cpp b/camera/CameraParameters.cpp
index 69d908f..41c4354 100644
--- a/camera/CameraParameters.cpp
+++ b/camera/CameraParameters.cpp
@@ -515,6 +515,9 @@
 
 void CameraParameters::set(const char *key, const char *value)
 {
+    if (key == NULL || value == NULL)
+        return;
+
     // XXX i think i can do this with strspn()
     if (strchr(key, '=') || strchr(key, ';')) {
         //XXX ALOGE("Key \"%s\"contains invalid character (= or ;)", key);