diff --git a/amxmodx/sorting.cpp b/amxmodx/sorting.cpp
index e7ff537f..b0f24b12 100644
--- a/amxmodx/sorting.cpp
+++ b/amxmodx/sorting.cpp
@@ -265,6 +265,7 @@ static cell AMX_NATIVE_CALL SortCustom1D(AMX *amx, cell *params)
 	qsort(array, array_size, sizeof(cell), sort1d_amx_custom);
 	g_AMXSortStack.pop();
 
+	unregisterSPForward(pfn);
 	delete pInfo;
 
 	return 1;