diff --git a/proc/sysinfo.c b/proc/sysinfo.c
index 952faf41..eeb513e4 100644
--- a/proc/sysinfo.c
+++ b/proc/sysinfo.c
@@ -227,7 +227,7 @@ static void old_Hertz_hack(void){
 
 #define NOTE_NOT_FOUND 42
 
-//extern char** environ;
+extern char** environ;
 
 /* for ELF executables, notes are pushed before environment and args */
 static unsigned long find_elf_note(unsigned long findme){