diff --git a/dlls/difxapi/Makefile.in b/dlls/difxapi/Makefile.in
index 3f61fd319ff..1788bedcf62 100644
--- a/dlls/difxapi/Makefile.in
+++ b/dlls/difxapi/Makefile.in
@@ -1,4 +1,6 @@
 MODULE = difxapi.dll
 
+EXTRADLLFLAGS = -mno-cygwin
+
 C_SRCS = \
 	main.c