diff --git a/gui/mplayer/common.c b/gui/mplayer/common.c
index 95376e3799..5af8b87e29 100644
--- a/gui/mplayer/common.c
+++ b/gui/mplayer/common.c
@@ -6,6 +6,7 @@
 #include <inttypes.h>
 #include <sys/stat.h>
 #include <unistd.h>
+#include <string.h>
 
 #include "app.h"
 #include "skin/font.h"
diff --git a/gui/mplayer/mw.c b/gui/mplayer/mw.c
index 40b1fe7dca..142eca3185 100644
--- a/gui/mplayer/mw.c
+++ b/gui/mplayer/mw.c
@@ -6,6 +6,7 @@
 #include <inttypes.h>
 #include <sys/stat.h>
 #include <unistd.h>
+#include <string.h>
 
 #include "gmplayer.h"
 #include "app.h"
diff --git a/gui/mplayer/pb.c b/gui/mplayer/pb.c
index 14ea8d97cc..3fad991c28 100644
--- a/gui/mplayer/pb.c
+++ b/gui/mplayer/pb.c
@@ -6,6 +6,7 @@
 #include <inttypes.h>
 #include <sys/stat.h>
 #include <unistd.h>
+#include <string.h>
 
 #include "app.h"
 #include "skin/font.h"
diff --git a/gui/mplayer/sw.c b/gui/mplayer/sw.c
index 245277f741..0e2116df60 100644
--- a/gui/mplayer/sw.c
+++ b/gui/mplayer/sw.c
@@ -2,6 +2,7 @@
 // sub window
 
 #include <inttypes.h>
+#include <string.h>
 
 #include "../config.h"
 #include "../libvo/x11_common.h"
diff --git a/libmpcodecs/vd_ijpg.c b/libmpcodecs/vd_ijpg.c
index 1e3b4576e3..2585b7346b 100644
--- a/libmpcodecs/vd_ijpg.c
+++ b/libmpcodecs/vd_ijpg.c
@@ -1,6 +1,7 @@
 
 #include <stdio.h>
 #include <stdlib.h>
+#include <string.h>
 
 #include "config.h"
 #include "mp_msg.h"
diff --git a/libmpcodecs/vd_mtga.c b/libmpcodecs/vd_mtga.c
index c06e34ffd5..a328ab037c 100644
--- a/libmpcodecs/vd_mtga.c
+++ b/libmpcodecs/vd_mtga.c
@@ -6,6 +6,7 @@
 
 #include <stdio.h>
 #include <stdlib.h>
+#include <string.h>
 
 #include "config.h"
 #include "mp_msg.h"