diff --git a/Source/JavaScriptCore/create_hash_table b/Source/JavaScriptCore/create_hash_table
index 62c0a7de76de..bd604ceaa8c9 100755
--- a/Source/JavaScriptCore/create_hash_table
+++ b/Source/JavaScriptCore/create_hash_table
@@ -24,7 +24,7 @@
  
 use strict;
 use warnings;
-use bigint;
+use Math::BigInt;
 use Getopt::Long qw(:config pass_through);
 
 my $file = shift @ARGV or die("Must provide source file as final argument.");
diff --git a/Source/WebCore/bindings/scripts/Hasher.pm b/Source/WebCore/bindings/scripts/Hasher.pm
index bef501922048..fd46f9e05a66 100644
--- a/Source/WebCore/bindings/scripts/Hasher.pm
+++ b/Source/WebCore/bindings/scripts/Hasher.pm
@@ -27,7 +27,7 @@
 package Hasher;
 
 use strict;
-use bigint;
+use Math::BigInt;
 
 my $mask64 = 2**64 - 1;
 my $mask32 = 2**32 - 1;