diff --git a/appl/popper/pop_get_command.c b/appl/popper/pop_get_command.c
index ffe8f06d0..afeb8d81a 100644
--- a/appl/popper/pop_get_command.c
+++ b/appl/popper/pop_get_command.c
@@ -11,7 +11,7 @@ static char SccsId[] = "@(#)@(#)pop_get_command.c	2.1  2.1 3/18/91";
 
 #include <stdio.h>
 #include <sys/types.h>
-#include <strings.h>
+#include <string.h>
 #include "popper.h"
 
 /* 
diff --git a/appl/popper/pop_get_subcommand.c b/appl/popper/pop_get_subcommand.c
index 84d0dfd68..c34e9765d 100644
--- a/appl/popper/pop_get_subcommand.c
+++ b/appl/popper/pop_get_subcommand.c
@@ -11,7 +11,7 @@ static char SccsId[] = "@(#)@(#)pop_get_subcommand.c	2.1  2.1 3/18/91";
 
 #include <stdio.h>
 #include <sys/types.h>
-#include <strings.h>
+#include <string.h>
 #include "popper.h"
 
 /* 
diff --git a/appl/popper/pop_msg.c b/appl/popper/pop_msg.c
index 08d133698..e709ffbc7 100644
--- a/appl/popper/pop_msg.c
+++ b/appl/popper/pop_msg.c
@@ -11,7 +11,7 @@ static char SccsId[] = "@(#)@(#)pop_msg.c	2.1  2.1 3/18/91";
 
 #include <stdio.h>
 #include <sys/types.h>
-#include <strings.h>
+#include <string.h>
 #if __STDC__
 #include <stdarg.h>
 #else
diff --git a/appl/popper/pop_pass.c b/appl/popper/pop_pass.c
index eb1f1346b..f3ba110a7 100644
--- a/appl/popper/pop_pass.c
+++ b/appl/popper/pop_pass.c
@@ -11,7 +11,7 @@ static char SccsId[] = "@(#)@(#)pop_pass.c	2.3  2.3 4/2/91";
 
 #include <stdio.h>
 #include <sys/types.h>
-#include <strings.h>
+#include <string.h>
 #include <pwd.h>
 #include "popper.h"
 
diff --git a/appl/popper/pop_send.c b/appl/popper/pop_send.c
index 40df48422..603f78bfe 100644
--- a/appl/popper/pop_send.c
+++ b/appl/popper/pop_send.c
@@ -11,7 +11,7 @@ static char SccsId[] = "@(#)@(#)pop_send.c	2.1  2.1 3/18/91";
 
 #include <stdio.h>
 #include <sys/types.h>
-#include <strings.h>
+#include <string.h>
 #include "popper.h"
 
 /* 
diff --git a/appl/popper/pop_updt.c b/appl/popper/pop_updt.c
index 24471f307..25610190c 100644
--- a/appl/popper/pop_updt.c
+++ b/appl/popper/pop_updt.c
@@ -12,7 +12,7 @@ static char SccsId[] = "@(#)@(#)pop_updt.c	2.3  2.3 3/20/91";
 #include <errno.h>
 #include <stdio.h>
 #include <sys/types.h>
-#include <strings.h>
+#include <string.h>
 #include <sys/stat.h>
 #include <sys/file.h>
 #include "popper.h"
diff --git a/appl/popper/pop_user.c b/appl/popper/pop_user.c
index 00cf910cc..e70aaa7f9 100644
--- a/appl/popper/pop_user.c
+++ b/appl/popper/pop_user.c
@@ -11,7 +11,7 @@ static char SccsId[] = "@(#)@(#)pop_user.c	2.1  2.1 3/18/91";
 
 #include <stdio.h>
 #include <sys/types.h>
-#include <strings.h>
+#include <string.h>
 #include "popper.h"
 
 /*