diff --git a/ChangeLog b/ChangeLog
index 6ab04ca445..36b95d51c5 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Sat Jun  5 11:00:48 2010  Tanaka Akira  <akr@fsij.org>
+
+	* error.c (rb_name_err_mesg_new): guard mesg, recv and method.
+	  The problem in [ruby-dev:41464] is caused because mesg is collected.
+
 Sat Jun  5 10:03:31 2010  Tanaka Akira  <akr@fsij.org>
 
 	* .gdbinit (rp): detect and show RTypedData.
diff --git a/error.c b/error.c
index d5589ccdaf..85f4c2a1be 100644
--- a/error.c
+++ b/error.c
@@ -825,11 +825,16 @@ VALUE
 rb_name_err_mesg_new(VALUE obj, VALUE mesg, VALUE recv, VALUE method)
 {
     VALUE *ptr = ALLOC_N(VALUE, NAME_ERR_MESG_COUNT);
+    VALUE result;
 
     ptr[0] = mesg;
     ptr[1] = recv;
     ptr[2] = method;
-    return TypedData_Wrap_Struct(rb_cNameErrorMesg, &name_err_mesg_data_type, ptr);
+    result = TypedData_Wrap_Struct(rb_cNameErrorMesg, &name_err_mesg_data_type, ptr);
+    RB_GC_GUARD(mesg);
+    RB_GC_GUARD(recv);
+    RB_GC_GUARD(method);
+    return result;
 }
 
 /* :nodoc: */