Fix typo in README.
diff --git a/README.rst b/README.rst
index 89abefa..33c31d6 100644
--- a/README.rst
+++ b/README.rst
@@ -71,7 +71,7 @@
   This instruments the code with MemorySanitizer to check for uninitialised
   memory reads. Experimental, needs recent clang on Linux/x86_64.
 - MemSanDbg.
-  Same as ASan but slower, with debug information, better stack traces and
+  Same as MemSan but slower, with debug information, better stack traces and
   origin tracking.
 - Check.
   This activates the compiler warnings that depend on optimization and treats