diff --git a/mozilla/jpeg/jconfig.h b/mozilla/jpeg/jconfig.h
index f61cab5c8c4..d181a5ec0cb 100644
--- a/mozilla/jpeg/jconfig.h
+++ b/mozilla/jpeg/jconfig.h
@@ -103,4 +103,5 @@
 #else
 #define ALIGN16_const_vector_short(name) const short name[8] __attribute__ ((aligned (16)))
 #define ALIGN16_const_vector_uchar(name) const unsigned char name[16] __attribute__ ((aligned (16)))
-#endif ! XP_WIN32 && _M_IX86 && !__GNUC
+#endif /* ! XP_WIN32 && _M_IX86 && !__GNUC */
+
diff --git a/mozilla/jpeg/jmorecfg.h b/mozilla/jpeg/jmorecfg.h
index f912c5b9673..82ae712b429 100644
--- a/mozilla/jpeg/jmorecfg.h
+++ b/mozilla/jpeg/jmorecfg.h
@@ -118,8 +118,8 @@ typedef short JCOEF;
 #if defined(__GNUC__) && defined(__i386__)
 #if defined(XP_MACOSX)
 #define HAVE_SSE2_INTRINSICS
-#endif ! XP_MACOSX
-#endif ! GNUC && i386
+#endif /* ! XP_MACOSX */
+#endif /* ! GNUC && i386 */
 
 /* Add support for other platforms here */