diff --git a/nsis/gvim.nsi b/nsis/gvim.nsi
index 994e0cb0e7216f..f4f7f3861456e5 100644
--- a/nsis/gvim.nsi
+++ b/nsis/gvim.nsi
@@ -1598,7 +1598,9 @@ Function _VimCalcEstimatedSize
 	${Logged4} IntOp $4 $4 + $R2
     ${EndIf}
     Pop $R2
-    StrCpy $0 $4
+
+    # Exit value:
+    StrCpy $0 ""
 
     # Restore the stack:
     Pop  $3