diff --git a/ChangeLog b/ChangeLog
index 31d7bd7..2f7f85d 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,4 +1,10 @@
-2005-09-27  Patrick Lam    <plam@mit.edu>
+2005-09-28  Patrick Lam  <plam@mit.edu>
+	* src/fccache.c (FcCacheMachineSignature):
+
+        Cast results of sizeof() to unsigned int to get rid of
+        warnings on x86_64 (thanks Matthias Clasen).
+
+2005-09-27  Patrick Lam  <plam@mit.edu>
 	* src/fccache.c (FcGlobalCacheSave, FcCacheCopyOld,
                 FcDirCacheWrite):
 
diff --git a/src/fccache.c b/src/fccache.c
index ecd8429..0dc697e 100644
--- a/src/fccache.c
+++ b/src/fccache.c
@@ -886,25 +886,25 @@ FcCacheMachineSignature ()
 	     "%4x %4x %4x %4x %4x %4x %4x %4x %4x %4x %4x %4x "
 	     "%4x %4x %4x %4x %4x %4x %4x\n", 
 	     m[0], m[1], m[2], m[3],
-	     sizeof (char),
-	     sizeof (char *),
-	     sizeof (int),
-	     sizeof (FcPattern),
-	     sizeof (FcPatternEltPtr),
-	     sizeof (struct _FcPatternElt *),
-	     sizeof (FcPatternElt),
-	     sizeof (FcObjectPtr),
-	     sizeof (FcValueListPtr),
-	     sizeof (FcValue),
-	     sizeof (FcValueBinding),
-	     sizeof (struct _FcValueList *),
-	     sizeof (FcCharSet),
-	     sizeof (FcCharLeaf **),
-	     sizeof (FcChar16 *),
-	     sizeof (FcChar16),
-	     sizeof (FcCharLeaf),
-	     sizeof (FcChar32),
-	     sizeof (FcCache));
+	     (unsigned int)sizeof (char),
+	     (unsigned int)sizeof (char *),
+	     (unsigned int)sizeof (int),
+	     (unsigned int)sizeof (FcPattern),
+	     (unsigned int)sizeof (FcPatternEltPtr),
+	     (unsigned int)sizeof (struct _FcPatternElt *),
+	     (unsigned int)sizeof (FcPatternElt),
+	     (unsigned int)sizeof (FcObjectPtr),
+	     (unsigned int)sizeof (FcValueListPtr),
+	     (unsigned int)sizeof (FcValue),
+	     (unsigned int)sizeof (FcValueBinding),
+	     (unsigned int)sizeof (struct _FcValueList *),
+	     (unsigned int)sizeof (FcCharSet),
+	     (unsigned int)sizeof (FcCharLeaf **),
+	     (unsigned int)sizeof (FcChar16 *),
+	     (unsigned int)sizeof (FcChar16),
+	     (unsigned int)sizeof (FcCharLeaf),
+	     (unsigned int)sizeof (FcChar32),
+	     (unsigned int)sizeof (FcCache));
 
     return buf;
 }