diff --git a/dlls/sfc_os/Makefile.in b/dlls/sfc_os/Makefile.in
index 047850bf490..1329b2e7967 100644
--- a/dlls/sfc_os/Makefile.in
+++ b/dlls/sfc_os/Makefile.in
@@ -1,4 +1,6 @@
 MODULE    = sfc_os.dll
 IMPORTLIB = sfc_os
 
+EXTRADLLFLAGS = -mno-cygwin
+
 C_SRCS = sfc_os.c