diff --git a/src/rev.cpp.in b/src/rev.cpp.in
index 506e641..3300664 100644
--- a/src/rev.cpp.in
+++ b/src/rev.cpp.in
@@ -70,7 +70,7 @@ const byte _openttd_revision_modified = !!MODIFIED!!;
  * final release will always have a lower version number than the released
  * version, thus making comparisons on specific revisions easy.
  */
-const uint32 _openttd_newgrf_version = 1 << 28 | 5 << 24 | 0 << 20 | 0 << 19 | (!!REVISION!! & ((1 << 19) - 1));
+const uint32 _openttd_newgrf_version = 1 << 28 | 5 << 24 | 0 << 20 | 1 << 19 | (!!REVISION!! & ((1 << 19) - 1));
 
 #ifdef __MORPHOS__
 /**