diff --git a/coreapi/linphonecore_jni.cc b/coreapi/linphonecore_jni.cc
index 084869204..e0b8ef53f 100644
--- a/coreapi/linphonecore_jni.cc
+++ b/coreapi/linphonecore_jni.cc
@@ -1790,7 +1790,7 @@ extern "C" void Java_org_linphone_core_LinphoneCoreImpl_muteMic(	JNIEnv*  env
 		,jobject  thiz
 		,jlong lc
 		,jboolean isMuted) {
-		linphone_core_enable_mic((LinphoneCore*)lc,isMuted);
+	linphone_core_enable_mic((LinphoneCore*)lc, !isMuted);
 }
 
 extern "C" jlong Java_org_linphone_core_LinphoneCoreImpl_interpretUrl(	JNIEnv*  env