--- a/media/libstagefright/moz.build
+++ b/media/libstagefright/moz.build
@@ -149,17 +149,18 @@ if CONFIG['_MSC_VER']:
         '-wd4309', # '=' : truncation of constant value
         '-wd4355', # 'this' : used in base member initializer list
         '-wd4804', # '>' : unsafe use of type 'bool' in operation
         '-wd4099', # mismatched class/struct tags
     ]
 elif CONFIG['GNU_CXX']:
     CFLAGS += [
         '-Wno-comment',
-        '-Wno-sign-compare'
+        '-Wno-sign-compare',
+        '-Wno-unused-function',
     ]
     CXXFLAGS += [
         '-Wno-format',
         '-Wno-format-security',
         '-Wno-multichar',
         '-Wno-sign-compare',
         '-Wno-unused',
     ]