diff --git a/engine/platform/android/vid_android.c b/engine/platform/android/vid_android.c
index 6746f237..65904097 100644
--- a/engine/platform/android/vid_android.c
+++ b/engine/platform/android/vid_android.c
@@ -332,7 +332,8 @@ rserr_t   R_ChangeDisplaySettings( int width, int height, qboolean fullscreen )
 
 	Android_GetScreenRes(&width, &height);
 
-	render_w = width, render_h = height;
+	render_w = width;
+	render_h = height;
 
 	Con_Reportf( "R_ChangeDisplaySettings: forced resolution to %dx%d)\n", width, height);
 
diff --git a/engine/platform/linux/vid_fbdev.c b/engine/platform/linux/vid_fbdev.c
index f9915db7..065a211c 100644
--- a/engine/platform/linux/vid_fbdev.c
+++ b/engine/platform/linux/vid_fbdev.c
@@ -125,7 +125,9 @@ rserr_t   R_ChangeDisplaySettings( int width, int height, qboolean fullscreen )
 	uint rotate = vid_rotate->value;
 
 	FB_GetScreenRes( &width, &height );
-	render_w = width, render_h = height;
+
+	render_w = width;
+	render_h = height;
 
 	Con_Reportf( "R_ChangeDisplaySettings: forced resolution to %dx%d)\n", width, height );
 
diff --git a/engine/ref_api.h b/engine/ref_api.h
index 2566c2fb..09e5321d 100644
--- a/engine/ref_api.h
+++ b/engine/ref_api.h
@@ -212,6 +212,14 @@ enum
 	REF_GL_CONTEXT_RESET_ISOLATION_FLAG    = 0x0008
 };
 
+typedef enum ref_screen_rotation_e
+{
+	REF_ROTATE_NONE = 0,
+	REF_ROTATE_CW = 1,
+	REF_ROTATE_UD = 2,
+	REF_ROTATE_CCW = 3,
+} ref_screen_rotation_t;
+
 typedef struct remap_info_s
 {
 	unsigned short	textures[MAX_SKINS];// alias textures
@@ -436,7 +444,7 @@ typedef struct ref_interface_s
 	// const char *(*R_GetInitError)( void );
 	void (*R_Shutdown)( void );
 	const char *(*R_GetConfigName)( void ); // returns config name without extension
-	qboolean (*R_SetDisplayTransform)( uint rotate, int x, int y, float scale_x, float scale_y );
+	qboolean (*R_SetDisplayTransform)( ref_screen_rotation_t rotate, int x, int y, float scale_x, float scale_y );
 
 	// only called for GL contexts
 	void (*GL_SetupAttributes)( int safegl );
diff --git a/ref_gl/gl_context.c b/ref_gl/gl_context.c
index 66d1eaec..e356f7fd 100644
--- a/ref_gl/gl_context.c
+++ b/ref_gl/gl_context.c
@@ -308,7 +308,7 @@ void R_ProcessEntData( qboolean allocate )
 		gEngfuncs.drawFuncs->R_ProcessEntData( allocate );
 }
 
-qboolean R_SetDisplayTransform( uint rotate, int offset_x, int offset_y, float scale_x, float scale_y )
+qboolean R_SetDisplayTransform( ref_screen_rotation_t rotate, int offset_x, int offset_y, float scale_x, float scale_y )
 {
 	qboolean ret = true;
 	if( rotate > 0 )