diff --git a/widget/public/nsIAppShell.h b/widget/public/nsIAppShell.h
index b4b0914397b..86b2d0326fc 100644
--- a/widget/public/nsIAppShell.h
+++ b/widget/public/nsIAppShell.h
@@ -28,7 +28,7 @@
 
 
 #define NS_IAPPSHELL_IID \
-{ 0xa0757c31, 0xeeac, 0x11d1, { 0x9e, 0xc1, 0x0, 0xaa, 0x0, 0x2f, 0xb8, 0x21 } };
+{ 0xa0757c31, 0xeeac, 0x11d1, { 0x9e, 0xc1, 0x0, 0xaa, 0x0, 0x2f, 0xb8, 0x21 } }
 
 
 /**