diff --git a/src/dp_common.h b/src/dp_common.h
index 0927104..efb1c43 100644
--- a/src/dp_common.h
+++ b/src/dp_common.h
@@ -16,11 +16,11 @@ extern "C" {
 typedef pid_t doomid_t; // unique id for each doom instance
 typedef u16 dmt_t; // for DP_MessageType values
 
-#define DoomScreenWidth   320u
-#define DoomScreenHeight  240u
-#define DoomBytesPerPixel   3u
-#define DoomFrameSize     (DoomScreenWidth * DoomScreenHeight * DoomBytesPerPixel)
+#define DoomScreenWidth   320
+#define DoomScreenHeight  240
+#define DoomBytesPerPixel   4
 #define DoomFramePitch    (DoomScreenWidth * DoomBytesPerPixel)
+#define DoomFrameSize     (DoomScreenWidth * DoomScreenHeight * DoomBytesPerPixel)
 
 typedef enum DP_MessageType
 {
@@ -66,7 +66,7 @@ typedef struct __attribute__((packed, aligned(4)))
 {
     MessageBase head;
     doomid_t doomId;
-    u8 frame[DoomScreenWidth * DoomScreenHeight * DoomBytesPerPixel];
+    u8 frame[DoomFrameSize];
 } MsgDoomFrame;
 
 typedef struct __attribute__((packed, aligned(4)))
diff --git a/src/dp_doom/linuxdoom-1.10/ib_video/ib_video_nng.c b/src/dp_doom/linuxdoom-1.10/ib_video/ib_video_nng.c
index df9ec7f..dcd1365 100644
--- a/src/dp_doom/linuxdoom-1.10/ib_video/ib_video_nng.c
+++ b/src/dp_doom/linuxdoom-1.10/ib_video/ib_video_nng.c
@@ -286,9 +286,19 @@ void IB_FinishUpdate (void)
 
 void IB_GetColor(unsigned char *bytes, unsigned char red, unsigned char green, unsigned char blue)
 {
+#if DoomBytesPerPixel == 3
+// FIXME: might be buggy
     bytes[0] = red;
     bytes[1] = green;
     bytes[2] = blue;
+#elif DoomBytesPerPixel == 4
+    bytes[0] = blue;
+    bytes[1] = green;
+    bytes[2] = red;
+    bytes[3] = 0xff; // alpha?
+#else
+#error Unhandled DoomBytesPerPixel value. How to IB_GetColor?
+#endif
 }
 
 static void I_Quit_Wrapper(int dummy)
@@ -302,6 +312,8 @@ static void I_Quit_Wrapper(int dummy)
 void IB_InitGraphics(const char *title, size_t screen_width, size_t screen_height, size_t *bytes_per_pixel)
 {
     (void) title;
+    log_set_level(LOG_DEBUG);
+
     g_frameBufferSize = screen_width * screen_height * DoomBytesPerPixel;
     assert(g_frameBufferSize == DoomFrameSize);
     g_frameBuffer = malloc(g_frameBufferSize);
@@ -313,7 +325,6 @@ void IB_InitGraphics(const char *title, size_t screen_width, size_t screen_heigh
 
     signal(SIGINT, I_Quit_Wrapper);
 
-    log_set_level(LOG_DEBUG);
 
     dp_nng_init_limits(1, 1, 1);