diff --git a/version.h b/version.h
index 3cca8e488f..25bebde5f9 100644
--- a/version.h
+++ b/version.h
@@ -1,5 +1,5 @@
 #define RUBY_VERSION "1.9.1"
-#define RUBY_RELEASE_DATE "2009-05-04"
+#define RUBY_RELEASE_DATE "2009-05-12"
 #define RUBY_PATCHLEVEL 0
 
 #define RUBY_VERSION_MAJOR 1
@@ -7,7 +7,7 @@
 #define RUBY_VERSION_TEENY 1
 #define RUBY_RELEASE_YEAR 2009
 #define RUBY_RELEASE_MONTH 5
-#define RUBY_RELEASE_DAY 4
+#define RUBY_RELEASE_DAY 12
 
 #ifdef RUBY_EXTERN
 RUBY_EXTERN const char ruby_version[];