diff --git a/xpcom/base/nsVersionComparator.h b/xpcom/base/nsVersionComparator.h
index 1e16bcb..a5a19e3 100644
--- a/xpcom/base/nsVersionComparator.h
+++ b/xpcom/base/nsVersionComparator.h
@@ -9,6 +9,7 @@
 #define nsVersionComparator_h_
 
 #include <assert.h>
+#include <stdint.h>
 #include <stdlib.h>
 #include <string.h>
 #if defined(XP_WIN) && !defined(UPDATER_NO_STRING_GLUE_STL)