diff --git a/ext/sdbm/_sdbm.c b/ext/sdbm/_sdbm.c
index b393783ddf..d810befbce 100644
--- a/ext/sdbm/_sdbm.c
+++ b/ext/sdbm/_sdbm.c
@@ -802,7 +802,7 @@ delpair(char *pag, datum key)
 		}
 #else
 #ifdef MEMMOVE
-		memmove(dst, src, m);
+		memmove(dst-m, src-m, m);
 #else
 		while (m--)
 			*--dst = *--src;
diff --git a/version.h b/version.h
index 088f1a924c..75768320a9 100644
--- a/version.h
+++ b/version.h
@@ -1,6 +1,6 @@
 #define RUBY_VERSION "2.2.0"
 #define RUBY_RELEASE_DATE "2015-02-19"
-#define RUBY_PATCHLEVEL 55
+#define RUBY_PATCHLEVEL 56
 
 #define RUBY_RELEASE_YEAR 2015
 #define RUBY_RELEASE_MONTH 2