diff --git a/ffserver.c b/ffserver.c
index 400009ac69a8f2733637b28765bf459c27f1b3eb..08b89a885f178e2853617bb321a6d465b6807a0e 100644
--- a/ffserver.c
+++ b/ffserver.c
@@ -26,6 +26,7 @@
 #define closesocket close
 #endif
 #include <string.h>
+#include <strings.h>
 #include <stdlib.h>
 #include "libavutil/random.h"
 #include "libavutil/avstring.h"
diff --git a/libavdevice/dv1394.c b/libavdevice/dv1394.c
index 56e61223e6724330ea27a10e86b18e06ee103260..de9725bdcf527ed15a02693605f32c81eb8fbcb7 100644
--- a/libavdevice/dv1394.c
+++ b/libavdevice/dv1394.c
@@ -28,6 +28,7 @@
 #include <sys/poll.h>
 #include <sys/time.h>
 #include <time.h>
+#include <strings.h>
 
 #include "libavformat/avformat.h"
 
diff --git a/libavdevice/v4l.c b/libavdevice/v4l.c
index de5080c85e6da734d0b323003817cb960ac9f83b..03694e8155b07fc5193e578626060f0dadd6ea82 100644
--- a/libavdevice/v4l.c
+++ b/libavdevice/v4l.c
@@ -30,6 +30,7 @@
 #define _LINUX_TIME_H 1
 #include <linux/videodev.h>
 #include <time.h>
+#include <strings.h>
 
 typedef struct {
     int fd;
diff --git a/libavdevice/v4l2.c b/libavdevice/v4l2.c
index 0b03640e7dd7d3c78bfba598cea1eb6cc90beea3..81875f6b54540a7da28a9672b06dfbbfac50b457 100644
--- a/libavdevice/v4l2.c
+++ b/libavdevice/v4l2.c
@@ -37,6 +37,7 @@
 #include <asm/types.h>
 #include <linux/videodev2.h>
 #include <time.h>
+#include <strings.h>
 
 static const int desired_video_buffers = 256;
 
diff --git a/libavformat/mp3.c b/libavformat/mp3.c
index 346c7ea1585faf4bf25e39905391dac042d21c04..1e4f21c5b26f24b77393fd4ec623dff4c0702a5e 100644
--- a/libavformat/mp3.c
+++ b/libavformat/mp3.c
@@ -19,6 +19,7 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
+#include <strings.h>
 #include "libavutil/avstring.h"
 #include "libavcodec/mpegaudio.h"
 #include "libavcodec/mpegaudiodecheader.h"
diff --git a/libavformat/rtsp.c b/libavformat/rtsp.c
index 79fa4e19ad98375c0cc4b3d11ba7c9587fb4742c..d1f454da161ce33ec1ed19446b6e0854b0dbdd87 100644
--- a/libavformat/rtsp.c
+++ b/libavformat/rtsp.c
@@ -24,6 +24,7 @@
 
 #include <sys/time.h>
 #include <unistd.h> /* for select() prototype */
+#include <strings.h>
 #include "network.h"
 #include "rtsp.h"
 
diff --git a/libavformat/utils.c b/libavformat/utils.c
index 723427a6b4c93415880b6056fa739fe3ab36f120..613de23f1b3ee993e47f6d21254beb478f19a805 100644
--- a/libavformat/utils.c
+++ b/libavformat/utils.c
@@ -24,6 +24,7 @@
 #include "riff.h"
 #include <sys/time.h>
 #include <time.h>
+#include <strings.h>
 
 #undef NDEBUG
 #include <assert.h>