diff --git a/README.md b/README.md
index 40b2434..8bb1ed7 100644
--- a/README.md
+++ b/README.md
@@ -1,11 +1,13 @@
 # OMX image viewer
 
-A GPU accelerated image viewer for the Raspberry Pi. 
+A GPU accelerated image viewer for the Raspberry Pi.
+
+Due to deprecation of the OpenMax API and the unavailability of those libraries on arm64, this project only supports 32bit operating systems.
 
 ## Building
 
 You will need the development header for libjpeg and libpng
-(Debian: libjpeg8-dev, libpng12-dev). Then build it on the Pi with:
+(Debian: libjpeg-dev, libpng-dev). Then build it on the Pi with:
 
     make ilclient
     make
diff --git a/omx_render.h b/omx_render.h
index 421ad1d..f39cb98 100644
--- a/omx_render.h
+++ b/omx_render.h
@@ -64,7 +64,7 @@ typedef struct OMX_RENDER_DISP_CONF{
 	
 } OMX_RENDER_DISP_CONF;
 
-struct OMX_RENDER_TRANSITION{
+typedef struct OMX_RENDER_TRANSITION{
 	enum transition_t{NONE, BLEND} type;
 	int durationMs;