diff --git a/filesystem.h b/filesystem.h
index 302d373..2d5dbc9 100644
--- a/filesystem.h
+++ b/filesystem.h
@@ -101,7 +101,7 @@
 #define LWG_2937_BEHAVIOUR
 
 // ghc::filesystem version in decimal (major * 10000 + minor * 100 + patch)
-#define GHC_FILESYSTEM_VERSION 10000L
+#define GHC_FILESYSTEM_VERSION 10001L
 
 namespace ghc {
 namespace filesystem {