diff --git a/bindings/c/CMakeLists.txt b/bindings/c/CMakeLists.txt
index 4a49e16c84..6290d69e22 100644
--- a/bindings/c/CMakeLists.txt
+++ b/bindings/c/CMakeLists.txt
@@ -58,8 +58,9 @@ if(APPLE)
   add_custom_command(OUTPUT ${symbols}
     COMMAND $<TARGET_FILE:Python::Interpreter> ${CMAKE_CURRENT_SOURCE_DIR}/symbolify.py
         ${CMAKE_CURRENT_SOURCE_DIR}/foundationdb/fdb_c.h
+        ${CMAKE_CURRENT_SOURCE_DIR}/foundationdb/fdb_c_internal.h
         ${symbols}
-    DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/symbolify.py ${CMAKE_CURRENT_SOURCE_DIR}/foundationdb/fdb_c.h
+    DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/symbolify.py ${CMAKE_CURRENT_SOURCE_DIR}/foundationdb/fdb_c.h ${CMAKE_CURRENT_SOURCE_DIR}/foundationdb/fdb_c_internal.h
     COMMENT "Generate exported_symbols_list")
   add_custom_target(exported_symbols_list DEPENDS ${symbols})
   add_dependencies(fdb_c exported_symbols_list)
diff --git a/bindings/c/symbolify.py b/bindings/c/symbolify.py
index 55d8dc81fd..b0c9dece64 100644
--- a/bindings/c/symbolify.py
+++ b/bindings/c/symbolify.py
@@ -2,9 +2,13 @@ if __name__ == '__main__':
     import re
     import sys
     r = re.compile('DLLEXPORT[^(]*(fdb_[^(]*)[(]')
-    (fdb_c_h, symbols_file) = sys.argv[1:]
-    with open(fdb_c_h, 'r') as f:
-        symbols = sorted(set('_' + m.group(1) for m in r.finditer(f.read())))
+    header_files = sys.argv[1:-1]
+    symbols_file = sys.argv[-1]
+    symbols = set()
+    for header_file in header_files:
+        with open(header_file, 'r') as f:
+            symbols.update('_' + m.group(1) for m in r.finditer(f.read()))
+    symbols = sorted(symbols)
     with open(symbols_file, 'w') as f:
         f.write('\n'.join(symbols))
         f.write('\n')