diff --git a/src/env_vars.cc b/src/env_vars.cc
index d6c04fa3..afee98aa 100644
--- a/src/env_vars.cc
+++ b/src/env_vars.cc
@@ -1,5 +1,9 @@
 #include "env_vars.hh"
 
+#if __APPLE__
+extern char **environ;
+#endif
+
 namespace Kakoune
 {