diff --git a/src/core/scripting.c b/src/core/scripting.c
index 9a0ee7698..add6da031 100644
--- a/src/core/scripting.c
+++ b/src/core/scripting.c
@@ -91,8 +91,16 @@ void mScriptBridgeInstallEngine(struct mScriptBridge* sb, struct mScriptEngine*
 
 #ifdef USE_DEBUGGERS
 void mScriptBridgeSetDebugger(struct mScriptBridge* sb, struct mDebugger* debugger) {
+	if (sb->debugger == debugger) {
+		return;
+	}
+	if (sb->debugger) {
+		sb->debugger->bridge = NULL;
+	}
 	sb->debugger = debugger;
-	debugger->bridge = sb;
+	if (debugger) {
+		debugger->bridge = sb;
+	}
 }
 
 struct mDebugger* mScriptBridgeGetDebugger(struct mScriptBridge* sb) {