diff --git a/ChangeLog b/ChangeLog
index c61d91f21a..443934e0b5 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Wed Mar  6 03:27:43 2013  KOSAKI Motohiro  <kosaki.motohiro@gmail.com>
+
+	* probes.d (symbol-create): change argument name `string' to
+	  `str'. `string' is a keyword for systemtap.
+
 Tue Mar  5 22:23:01 2013  KOSAKI Motohiro  <kosaki.motohiro@gmail.com>
 
 	* probes.d: added argument name
diff --git a/probes.d b/probes.d
index 4c36e03fbd..89c254ca6f 100644
--- a/probes.d
+++ b/probes.d
@@ -151,15 +151,15 @@ provider ruby {
   probe string__create(long length, const char *filename, int lineno);
 
   /*
-     ruby:::symbol-create(string, filename, lineno);
+     ruby:::symbol-create(str, filename, lineno);
 
      This probe is fired when a Symbol is about to be allocated.
 
-      * `string` the contents of the symbol (string)
+      * `str` the contents of the symbol (string)
       * `filename` the name of the file where the string is allocated (string)
       * `lineno` the line number in the file where the string is allocated (int)
   */
-  probe symbol__create(const char *string, const char *filename, int lineno);
+  probe symbol__create(const char *str, const char *filename, int lineno);
 
   /*
      ruby:::parse-begin(sourcefile, lineno);