diff --git a/CHANGELOG b/CHANGELOG
index 38a540e..79c1ff4 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,4 +1,4 @@
-*SVN*
+*1.5.1_rc4* (April 27, 2007)
 
 * Fix $F breakage from [6598].  [sam]
 
diff --git a/Rakefile b/Rakefile
index 1d2d61f..0350c7a 100644
--- a/Rakefile
+++ b/Rakefile
@@ -5,7 +5,7 @@ PROTOTYPE_ROOT     = File.expand_path(File.dirname(__FILE__))
 PROTOTYPE_SRC_DIR  = File.join(PROTOTYPE_ROOT, 'src')
 PROTOTYPE_DIST_DIR = File.join(PROTOTYPE_ROOT, 'dist')
 PROTOTYPE_PKG_DIR  = File.join(PROTOTYPE_ROOT, 'pkg')
-PROTOTYPE_VERSION  = '1.5.1_rc3'
+PROTOTYPE_VERSION  = '1.5.1_rc4'
 
 task :default => [:dist, :package, :clean_package_source]