diff --git a/SilentPatchSA/rwpred.hpp b/SilentPatchSA/rwpred.hpp
index 5dadcd1..a1e4745 100644
--- a/SilentPatchSA/rwpred.hpp
+++ b/SilentPatchSA/rwpred.hpp
@@ -4,22 +4,22 @@
 #include <rpworld.h>
 
 template <typename Pred>
-RwFrame* RwFrameForAllChildren(RwFrame* frame, Pred callback)
+RwFrame* RwFrameForAllChildren(RwFrame* frame, Pred&& callback)
 {
 	for ( RwFrame* curFrame = frame->child; curFrame != nullptr; curFrame = curFrame->next )
 	{
-		if ( callback(curFrame) == nullptr )
+		if ( std::forward<Pred>(callback)(curFrame) == nullptr )
 			break;
 	}
 	return frame;
 }
 
 template <typename Pred>
-RwFrame* RwFrameForAllObjects(RwFrame* frame, Pred callback)
+RwFrame* RwFrameForAllObjects(RwFrame* frame, Pred&& callback)
 {
 	for ( RwLLLink* link = rwLinkListGetFirstLLLink(&frame->objectList); link != rwLinkListGetTerminator(&frame->objectList); link = rwLLLinkGetNext(link) )
 	{
-		if ( callback(&rwLLLinkGetData(link, RwObjectHasFrame, lFrame)->object) == nullptr )
+		if ( std::forward<Pred>(callback)(&rwLLLinkGetData(link, RwObjectHasFrame, lFrame)->object) == nullptr )
 			break;
 	}
 
@@ -27,22 +27,22 @@ RwFrame* RwFrameForAllObjects(RwFrame* frame, Pred callback)
 }
 
 template <typename Pred>
-RpClump* RpClumpForAllAtomics(RpClump* clump, Pred callback)
+RpClump* RpClumpForAllAtomics(RpClump* clump, Pred&& callback)
 {
 	for ( RwLLLink* link = rwLinkListGetFirstLLLink(&clump->atomicList); link != rwLinkListGetTerminator(&clump->atomicList); link = rwLLLinkGetNext(link) )
 	{
-		if ( callback(rwLLLinkGetData(link, RpAtomic, inClumpLink)) == nullptr )
+		if ( std::forward<Pred>(callback)(rwLLLinkGetData(link, RpAtomic, inClumpLink)) == nullptr )
 			break;
 	}
 	return clump;
 }
 
 template <typename Pred>
-RpGeometry* RpGeometryForAllMaterials(RpGeometry* geometry, Pred callback)
+RpGeometry* RpGeometryForAllMaterials(RpGeometry* geometry, Pred&& callback)
 {
 	for ( RwInt32 i = 0, j = geometry->matList.numMaterials; i < j; i++ )
 	{
-		if ( callback(geometry->matList.materials[i]) == nullptr )
+		if ( std::forward<Pred>(callback)(geometry->matList.materials[i]) == nullptr )
 			break;
 	}
 	return geometry;