diff --git a/sim/ppc/main.c b/sim/ppc/main.c
index d9a40700973..83b629ec14a 100644
--- a/sim/ppc/main.c
+++ b/sim/ppc/main.c
@@ -42,14 +42,14 @@
 #include <string.h>
 #include <errno.h>
 
+#include "environ.h"
+
 #if !defined(O_NONBLOCK) || !defined(F_GETFL) || !defined(F_SETFL)
 #undef WITH_STDIO
 #define WITH_STDIO DO_USE_STDIO
 #endif
 
 
-extern char **environ;
-
 static psim *simulation = NULL;