diff --git a/libfreerdp/codec/rfx.c b/libfreerdp/codec/rfx.c
index c23171ef3..59f0822b7 100644
--- a/libfreerdp/codec/rfx.c
+++ b/libfreerdp/codec/rfx.c
@@ -33,7 +33,7 @@
 #include <winpr/tchar.h>
 #include <winpr/sysinfo.h>
 #include <winpr/registry.h>
-#include <winpr\tchar.h>
+#include <winpr/tchar.h>
 
 #include <freerdp/codec/rfx.h>
 #include <freerdp/constants.h>