diff --git a/contrib/devtools/symbol-check.py b/contrib/devtools/symbol-check.py
index 4f6a18da2..8dd6d8f03 100755
--- a/contrib/devtools/symbol-check.py
+++ b/contrib/devtools/symbol-check.py
@@ -98,10 +98,15 @@ if __name__ == '__main__':
     cppfilt = CPPFilt()
     retval = 0
     for filename in sys.argv[1:]:
+        # Check imported symbols
         for sym,version in read_symbols(filename, True):
             if version and not check_version(MAX_VERSIONS, version):
                 print('%s: symbol %s from unsupported version %s' % (filename, cppfilt(sym), version))
                 retval = 1
+        # Check exported symbols
+        for sym,version in read_symbols(filename, False):
+            print('%s: export of symbol %s not allowed' % (filename, cppfilt(sym)))
+            retval = 1
 
     exit(retval)