diff --git a/services/audioflinger/Effects.cpp b/services/audioflinger/Effects.cpp
index d3492d9..b267d88 100644
--- a/services/audioflinger/Effects.cpp
+++ b/services/audioflinger/Effects.cpp
@@ -558,7 +558,8 @@
       mStatus(NO_INIT),
       mMaxDisableWaitCnt(1), // set by configure(), should be >= 1
       mDisableWaitCnt(0),    // set by process() and updateState()
-      mOffloaded(false)
+      mOffloaded(false),
+      mAddedToHal(false)
 #ifdef FLOAT_EFFECT_CHAIN
       , mSupportsFloat(false)
 #endif
@@ -1080,7 +1081,12 @@
 {
     if ((mDescriptor.flags & EFFECT_FLAG_TYPE_MASK) == EFFECT_FLAG_TYPE_PRE_PROC ||
          (mDescriptor.flags & EFFECT_FLAG_TYPE_MASK) == EFFECT_FLAG_TYPE_POST_PROC) {
+        if (mAddedToHal) {
+            return;
+        }
+
         (void)getCallback()->addEffectToHal(mEffectInterface);
+        mAddedToHal = true;
     }
 }
 
@@ -1176,7 +1182,12 @@
 {
     if ((mDescriptor.flags & EFFECT_FLAG_TYPE_MASK) == EFFECT_FLAG_TYPE_PRE_PROC ||
              (mDescriptor.flags & EFFECT_FLAG_TYPE_MASK) == EFFECT_FLAG_TYPE_POST_PROC) {
+        if (!mAddedToHal) {
+            return NO_ERROR;
+        }
+
         getCallback()->removeEffectFromHal(mEffectInterface);
+        mAddedToHal = false;
     }
     return NO_ERROR;
 }