diff --git a/src/shell_manager.cc b/src/shell_manager.cc
index d2d6789a..e6fb068c 100644
--- a/src/shell_manager.cc
+++ b/src/shell_manager.cc
@@ -10,6 +10,8 @@
 #include <sys/wait.h>
 #include <unistd.h>
 
+extern char **environ;
+
 namespace Kakoune
 {