diff --git a/configure.in b/configure.in
index b8672ed060c..62ae85c4cae 100644
--- a/configure.in
+++ b/configure.in
@@ -41,7 +41,7 @@ AC_CONFIG_HEADER(main/php_config.h)
 MAJOR_VERSION=5
 MINOR_VERSION=0
 RELEASE_VERSION=0
-EXTRA_VERSION="RC1"
+EXTRA_VERSION="RC1-dev"
 VERSION="$MAJOR_VERSION.$MINOR_VERSION.$RELEASE_VERSION$EXTRA_VERSION"
 
 dnl Define where extension directories are located in the configure context
diff --git a/main/php_version.h b/main/php_version.h
index e8fe88fb12c..2b071138542 100644
--- a/main/php_version.h
+++ b/main/php_version.h
@@ -3,5 +3,5 @@
 #define PHP_MAJOR_VERSION 5
 #define PHP_MINOR_VERSION 0
 #define PHP_RELEASE_VERSION 0
-#define PHP_EXTRA_VERSION "RC1"
-#define PHP_VERSION "5.0.0RC1"
+#define PHP_EXTRA_VERSION "RC1-dev"
+#define PHP_VERSION "5.0.0RC1-dev"