diff --git a/nouveau/nouveau.c b/nouveau/nouveau.c
index 687bbb02..0071249e 100644
--- a/nouveau/nouveau.c
+++ b/nouveau/nouveau.c
@@ -30,6 +30,7 @@
 #include <stdlib.h>
 #include <stdint.h>
 #include <string.h>
+#include <strings.h>
 #include <stdbool.h>
 #include <assert.h>
 #include <errno.h>
diff --git a/tests/modetest/modetest.c b/tests/modetest/modetest.c
index 53dfe05b..63d2059c 100644
--- a/tests/modetest/modetest.c
+++ b/tests/modetest/modetest.c
@@ -50,6 +50,7 @@
 #include <inttypes.h>
 #include <unistd.h>
 #include <string.h>
+#include <strings.h>
 #include <errno.h>
 #include <sys/poll.h>
 #include <sys/time.h>