1 files changed, 1 insertions, 1 deletions
diff --git a/ruby.h b/ruby.h
index 3d2b099062..3b74185f53 100644
--- a/ruby.h
+++ b/ruby.h
@@ -261,7 +261,7 @@ double rb_num2dbl _((VALUE));
 #define NUM2DBL(x) rb_num2dbl((VALUE)(x))
 
 /* obsolete API - use StringValue() */
-char *rb_str2cstr _((VALUE,int*));
+char *rb_str2cstr _((VALUE,long*));
 /* obsolete API - use StringValuePtr() */
 #define STR2CSTR(x) rb_str2cstr((VALUE)(x),0)