diff --git a/php4dll.dsp b/php4dll.dsp
index e1178aadb57..1a4831296a4 100644
--- a/php4dll.dsp
+++ b/php4dll.dsp
@@ -123,7 +123,7 @@ SOURCE=.\main.c
 # End Source File
 # Begin Source File
 
-SOURCE=.\output.c
+SOURCE=.\ext\standard\output.c
 # End Source File
 # Begin Source File