diff --git a/app/src/controlevent.c b/app/src/controlevent.c
index ba52e71..edb7a1a 100644
--- a/app/src/controlevent.c
+++ b/app/src/controlevent.c
@@ -1,6 +1,7 @@
 #include "controlevent.h"
 
 #include <SDL2/SDL_stdinc.h>
+#include <string.h>
 
 #include "lockutil.h"
 #include "log.h"
diff --git a/app/src/server.c b/app/src/server.c
index 745a785..a35f5d1 100644
--- a/app/src/server.c
+++ b/app/src/server.c
@@ -3,6 +3,7 @@
 #include <errno.h>
 #include <inttypes.h>
 #include <stdint.h>
+#include <stdio.h>
 #include <SDL2/SDL_assert.h>
 #include <SDL2/SDL_timer.h>
 
diff --git a/app/tests/test_control_event_queue.c b/app/tests/test_control_event_queue.c
index 2f3fc99..dc89fa2 100644
--- a/app/tests/test_control_event_queue.c
+++ b/app/tests/test_control_event_queue.c
@@ -1,4 +1,5 @@
 #include <assert.h>
+#include <string.h>
 
 #include "controlevent.h"
 
diff --git a/app/tests/test_control_event_serialize.c b/app/tests/test_control_event_serialize.c
index 112ea8b..e15c64b 100644
--- a/app/tests/test_control_event_serialize.c
+++ b/app/tests/test_control_event_serialize.c
@@ -1,4 +1,5 @@
 #include <assert.h>
+#include <string.h>
 
 #include "controlevent.h"