diff --git a/Quicksilver/Code-QuickStepCore/QSObject.m b/Quicksilver/Code-QuickStepCore/QSObject.m
index a28d285da..9f345639e 100644
--- a/Quicksilver/Code-QuickStepCore/QSObject.m
+++ b/Quicksilver/Code-QuickStepCore/QSObject.m
@@ -53,8 +53,8 @@ + (void)interfaceChanged {
 - (id)init {
 	if (self = [super init]) {
 
-		data = [NSMutableDictionary dictionaryWithCapacity:0];
-		meta = [NSMutableDictionary dictionaryWithCapacity:0];
+		data = [QSThreadSafeMutableDictionary dictionaryWithCapacity:0];
+		meta = [QSThreadSafeMutableDictionary dictionaryWithCapacity:0];
 		cache = [QSThreadSafeMutableDictionary dictionaryWithCapacity:0];
 		name = nil;
 		label = nil;