diff --git a/apps/ca.c b/apps/ca.c
index 1242d3732..f48c8a18f 100644
--- a/apps/ca.c
+++ b/apps/ca.c
@@ -93,7 +93,7 @@
 #    else
 #      include <unixlib.h>
 #    endif
-#  elif !defined(OPENSSL_SYS_VXWORKS)
+#  elif !defined(OPENSSL_SYS_VXWORKS) && !defined(OPENSSL_SYS_WINDOWS)
 #    include <sys/file.h>
 #  endif
 #endif