diff --git a/src_main/core/piobject.cpp b/src_main/core/piobject.cpp
index 91e38dcb..a47ed65d 100755
--- a/src_main/core/piobject.cpp
+++ b/src_main/core/piobject.cpp
@@ -347,7 +347,7 @@ void PIObject::piDisconnect(PIObject * src, const PIString & sig) {
 			PIObject * dest = cc.dest_o;
 			src->connections.remove(i);
 			i--;
-#ifndef ANDROID
+#if !defined(ANDROID) && !defined(MAC_OS) && !defined(FREERTOS)
 			PIMutexLocker _mld(dest->mutex_connect, src != dest);
 #endif
 			dest->updateConnectors();
@@ -364,10 +364,8 @@ void PIObject::piDisconnect(PIObject * src) {
 		//piCout << "disconnect"<< src->className()<< o->className();
 		if (!o || (o == src)) continue;
 		if (!o->isPIObject()) continue;
-#ifndef ANDROID
-#  ifndef MAC_OS
+#if !defined(ANDROID) && !defined(MAC_OS) && !defined(FREERTOS)
 		PIMutexLocker _mld(o->mutex_connect, src != o);
-#  endif
 #endif
 		PIVector<__Connection> & oc(o->connections);
 		for (int i = 0; i < oc.size_s(); ++i) {