diff --git a/math/gen-libm-test.pl b/math/gen-libm-test.pl
index 1237e51021..052937f89e 100755
--- a/math/gen-libm-test.pl
+++ b/math/gen-libm-test.pl
@@ -514,7 +514,7 @@ sub parse_ulps {
       next;
     }
     if (/^Function: /) {
-      if (/\Real part of/) {
+      if (/Real part of/) {
 	s/Real part of //;
 	$type = 'real';
       } elsif (/Imaginary part of/) {