--- mmap.c.orig	Thu Feb  1 14:52:50 2007
+++ mmap.c	Thu Feb  1 14:55:16 2007
@@ -1113,7 +1113,7 @@
 	}
 	else {
 	    RSTRING(str)->ptr += start;
-	    repl = rb_reg_regsub(repl, str, regs);
+	    repl = rb_reg_regsub(repl, str, regs, pat);
 	    RSTRING(str)->ptr -= start;
 	}
 	if (OBJ_TAINTED(repl)) tainted = 1;
@@ -1211,7 +1211,7 @@
 	}
 	else {
 	    RSTRING(str)->ptr += start;
-	    val = rb_reg_regsub(repl, str, regs);
+	    val = rb_reg_regsub(repl, str, regs, pat);
 	    RSTRING(str)->ptr -= start;
 	}
 	if (OBJ_TAINTED(repl)) tainted = 1;