diff --git a/libmisc/env.c b/libmisc/env.c
index fc6dbced..c6ab6727 100644
--- a/libmisc/env.c
+++ b/libmisc/env.c
@@ -26,7 +26,6 @@
 #define NEWENVP_STEP 16
 size_t newenvc = 0;
 /*@null@*/char **newenvp = NULL;
-extern char **environ;
 
 static const char *const forbid[] = {
 	"_RLD_=",
diff --git a/src/login.c b/src/login.c
index c55f4de0..ea2b52ee 100644
--- a/src/login.c
+++ b/src/login.c
@@ -89,7 +89,6 @@ static char tmsg[256];
 
 extern char **newenvp;
 extern size_t newenvc;
-extern char **environ;
 
 #ifndef	ALARM
 #define	ALARM	60
diff --git a/src/newgrp.c b/src/newgrp.c
index ac18f0ca..d04dace1 100644
--- a/src/newgrp.c
+++ b/src/newgrp.c
@@ -29,7 +29,6 @@
 const char *Prog;
 
 extern char **newenvp;
-extern char **environ;
 
 #ifdef HAVE_SETGROUPS
 static int ngroups;
diff --git a/src/sulogin.c b/src/sulogin.c
index ddb0d451..0d5b411d 100644
--- a/src/sulogin.c
+++ b/src/sulogin.c
@@ -37,8 +37,6 @@ static struct passwd pwent;
 extern char **newenvp;
 extern size_t newenvc;
 
-extern char **environ;
-
 #ifndef	ALARM
 #define	ALARM	60
 #endif