3 files changed, 4 insertions, 2 deletions

diff --git a/firmware/export/audio.h b/firmware/export/audio.h
index 6833761652..1e09081ba5 100644
--- a/firmware/export/audio.h
+++ b/firmware/export/audio.h
@@ -22,7 +22,7 @@
 #define AUDIO_H
 
 #include <stdbool.h>
-#include <sys/types.h>
+#include <string.h> /* size_t */
 #include "config.h"
 /* These must always be included with audio.h for this to compile under
    cetain conditions. Do it here or else spread the complication around to
diff --git a/firmware/export/config/sim.h b/firmware/export/config/sim.h
index 56c3e18229..5b42394b1f 100644
--- a/firmware/export/config/sim.h
+++ b/firmware/export/config/sim.h
@@ -95,3 +95,5 @@
 /* default for 100% in the sim */
 #define DEFAULT_BRIGHTNESS_SETTING MAX_BRIGHTNESS_SETTING
 #endif
+
+#define _ISOC99_SOURCE 1
diff --git a/firmware/export/pcm.h b/firmware/export/pcm.h
index e67d459693..0f8222f90d 100644
--- a/firmware/export/pcm.h
+++ b/firmware/export/pcm.h
@@ -21,7 +21,7 @@
 #ifndef PCM_PLAYBACK_H
 #define PCM_PLAYBACK_H
 
-#include <sys/types.h>
+#include <string.h> /* size_t */
 
 #define DMA_REC_ERROR_DMA       (-1)
 #ifdef HAVE_SPDIF_REC