diff --git a/src/common/macros.h b/src/common/macros.h
index ff7da410..a314ac9a 100644
--- a/src/common/macros.h
+++ b/src/common/macros.h
@@ -32,11 +32,13 @@
  * On Windows, symbols are local unless explicitly exported,
  * see https://gcc.gnu.org/wiki/Visibility
  */
+#ifndef BT_HIDDEN
 #if defined(_WIN32) || defined(__CYGWIN__)
 #define BT_HIDDEN
 #else
 #define BT_HIDDEN __attribute__((visibility("hidden")))
 #endif
+#endif
 
 /*
  * Yield `ref`'s value while setting `ref` to NULL.