diff --git a/ChangeLog b/ChangeLog
index 92a069387..84c65799e 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2013-11-08  Vladimir Serbinenko  <phcoder@gmail.com>
+
+	* grub-core/lib/libgcrypt/cipher/idea.c (mul_inv): Remove signed
+	divisions.
+
 2013-11-08  Vladimir Serbinenko  <phcoder@gmail.com>
 
 	* grub-core/lib/libgcrypt/mpi/mpih-div.c (_gcry_mpih_divrem):
diff --git a/grub-core/lib/libgcrypt/cipher/idea.c b/grub-core/lib/libgcrypt/cipher/idea.c
index c025c95f2..3c5578f95 100644
--- a/grub-core/lib/libgcrypt/cipher/idea.c
+++ b/grub-core/lib/libgcrypt/cipher/idea.c
@@ -72,8 +72,8 @@ mul_inv( u16 x )
 
     if( x < 2 )
 	return x;
-    t1 = 0x10001L / x;
-    y =  0x10001L % x;
+    t1 = 0x10001UL / x;
+    y =  0x10001UL % x;
     if( y == 1 )
 	return (1-t1) & 0xffff;