diff --git a/orte/mca/pls/base/pls_base_context.c b/orte/mca/pls/base/pls_base_context.c
index 56cc8a1fad..6412077d2a 100644
--- a/orte/mca/pls/base/pls_base_context.c
+++ b/orte/mca/pls/base/pls_base_context.c
@@ -39,6 +39,7 @@
 #include "orte/mca/pls/base/base.h"
 #include "orte/mca/errmgr/errmgr.h"
 
+extern char **environ;
 
 int orte_pls_base_check_context_cwd(orte_app_context_t *context,
                                     bool want_chdir)