diff --git a/apps/playback.c b/apps/playback.c
index 23d68f4be9..f2e029ba30 100644
--- a/apps/playback.c
+++ b/apps/playback.c
@@ -1576,8 +1576,8 @@ static void codec_advance_buffer_callback(size_t amount)
         int result;
         LOGFQUEUE("codec >| audio Q_AUDIO_REBUFFER_SEEK");
         
-        result = (int)queue_send(&audio_queue, Q_AUDIO_REBUFFER_SEEK,
-                                 (void *)(ci.curpos + amount));
+        result = (int)(intptr_t)queue_send(&audio_queue, Q_AUDIO_REBUFFER_SEEK,
+                                           (void *)(uintptr_t)(ci.curpos + amount));
 
         switch (result)
         {
@@ -1719,8 +1719,8 @@ static bool codec_seek_buffer_callback(size_t newpos)
         int result;
         
         LOGFQUEUE("codec >| audio Q_AUDIO_REBUFFER_SEEK");
-        result = (int)queue_send(&audio_queue, Q_AUDIO_REBUFFER_SEEK,
-                                 (void *)newpos);
+        result = (int)(intptr_t)queue_send(&audio_queue, Q_AUDIO_REBUFFER_SEEK,
+                                           (void *)(uintptr_t)newpos);
         
         switch (result)
         {
@@ -1855,7 +1855,8 @@ static bool codec_load_next_track(void)
     
     trigger_cpu_boost();
     LOGFQUEUE("codec >| audio Q_AUDIO_CHECK_NEW_TRACK");
-    result = (int)queue_send(&audio_queue, Q_AUDIO_CHECK_NEW_TRACK, NULL);
+    result = (int)(intptr_t)queue_send(&audio_queue, Q_AUDIO_CHECK_NEW_TRACK,
+                                       NULL);
 
 #if 0 /* Q_CODEC_REQUEST_PENDING never posted anyway */
     while (1) 
@@ -3625,12 +3626,12 @@ static void audio_thread(void)
 
             case Q_AUDIO_REBUFFER_SEEK:
                 LOGFQUEUE("audio < Q_AUDIO_REBUFFER_SEEK");
-                result = (void *)audio_rebuffer_and_seek((size_t)ev.data);
+                result = (void *)(intptr_t)audio_rebuffer_and_seek((size_t)ev.data);
                 break;
 
             case Q_AUDIO_CHECK_NEW_TRACK:
                 LOGFQUEUE("audio < Q_AUDIO_CHECK_NEW_TRACK");
-                result = (void *)audio_check_new_track();
+                result = (void *)(intptr_t)audio_check_new_track();
                 break;
 
             case Q_AUDIO_DIR_SKIP:
diff --git a/apps/plugins/doom/d_deh.c b/apps/plugins/doom/d_deh.c
index 2aa9b83422..632146868e 100755
--- a/apps/plugins/doom/d_deh.c
+++ b/apps/plugins/doom/d_deh.c
@@ -1466,7 +1466,7 @@ void ProcessDehFile(const char *filename, const char *outfilename, int lumpnum)
    // killough 10/98: allow DEH files to come from wad lumps
    if (filename)
    {
-      if ((int)(infile.inp = (void *) open(filename,O_RDONLY))<0)
+      if ((intptr_t)(infile.inp = (void *)(intptr_t)open(filename,O_RDONLY))<0)
       {
          printf( "-deh file %s not found\n",filename);
          return;  // should be checked up front anyway
@@ -1558,7 +1558,7 @@ void ProcessDehFile(const char *filename, const char *outfilename, int lumpnum)
    if (infile.lump)
       W_UnlockLumpNum(lumpnum);                 // Mark purgable
    else
-      close((int) infile.inp);              // Close real file
+      close((int)(intptr_t) infile.inp);              // Close real file
 
    close(fileout);
 }
diff --git a/firmware/include/inttypes.h b/firmware/include/inttypes.h
index 6127485a8a..e23e1da960 100644
--- a/firmware/include/inttypes.h
+++ b/firmware/include/inttypes.h
@@ -36,6 +36,8 @@
 #if ULONG_MAX == 0xfffffffful
 #define int32_t long
 #define uint32_t unsigned long
+#define intptr_t long
+#define uintptr_t unsigned long
 #elif UINT_MAX == 0xffffffffu
 #define int32_t int
 #define uint32_t unsigned int
@@ -45,6 +47,8 @@
 #if ULONG_MAX == 0xffffffffffffffffull
 #define int64_t long
 #define uint64_t unsigned long
+#define intptr_t long
+#define uintptr_t unsigned long
 #else
 #define int64_t long long
 #define uint64_t unsigned long long