diff --git a/src/core/wee-command.c b/src/core/wee-command.c
index a6926c582..d15a7bccc 100644
--- a/src/core/wee-command.c
+++ b/src/core/wee-command.c
@@ -78,6 +78,9 @@
 #include "../plugins/plugin-config.h"
 
 
+extern char **environ;
+
+
 /*
  * Callback for command "/away".
  *
diff --git a/src/core/wee-completion.c b/src/core/wee-completion.c
index 732d3e32b..c6b323c63 100644
--- a/src/core/wee-completion.c
+++ b/src/core/wee-completion.c
@@ -55,6 +55,9 @@
 #include "../plugins/plugin.h"
 
 
+extern char **environ;
+
+
 /*
  * Adds bar names to completion list.
  */