diff --git a/src/opt/dar/darCut.c b/src/opt/dar/darCut.c
index da1c9eafa6..49f36ca142 100644
--- a/src/opt/dar/darCut.c
+++ b/src/opt/dar/darCut.c
@@ -85,11 +85,10 @@ void Dar_ObjCutPrint( Aig_Man_t * p, Aig_Obj_t * pObj )
 ***********************************************************************/
 static inline int Dar_WordCountOnes( unsigned uWord )
 {
-    uWord = (uWord & 0x55555555) + ((uWord>>1) & 0x55555555);
-    uWord = (uWord & 0x33333333) + ((uWord>>2) & 0x33333333);
-    uWord = (uWord & 0x0F0F0F0F) + ((uWord>>4) & 0x0F0F0F0F);
-    uWord = (uWord & 0x00FF00FF) + ((uWord>>8) & 0x00FF00FF);
-    return  (uWord & 0x0000FFFF) + (uWord>>16);
+    uWord = uWord - ((uWord >> 1) & 0x55555555);
+    uWord = (uWord & 0x33333333) + ((uWord >> 2) & 0x33333333);
+    uWord = (uWord + (uWord >> 4)) & 0x0F0F0F0F;
+    return (int)((uWord * 0x01010101) >> 24);
 }
 
 /**Function*************************************************************