diff --git a/src/lib/conversion/rotation.cpp b/src/lib/conversion/rotation.cpp
index 2cb8f9c5ab..1bff5d7ba4 100644
--- a/src/lib/conversion/rotation.cpp
+++ b/src/lib/conversion/rotation.cpp
@@ -249,16 +249,6 @@ rotate_3f(enum Rotation rot, float &x, float &y, float &z)
 			return;
 		}
 
-	case ROTATION_YAW_293_PITCH_68_ROLL_90: {
-			const float tmpx = x;
-			const float tmpy = y;
-			const float tmpz = z;
-			x =  -0.390731f * tmpy - 0.920505f * tmpz;
-			y = 0.374607f * tmpx - 0.853477f * tmpy + 0.362280f * tmpz;
-			z = -0.927184f * tmpx - 0.344827f * tmpy +  0.146371f * tmpz;
-			return;
-		}
-
 	case ROTATION_PITCH_9_YAW_180: {
 			const float tmpx = x;
 			const float tmpy = y;
diff --git a/src/lib/conversion/rotation.h b/src/lib/conversion/rotation.h
index 46dc75a48b..96470ea06d 100644
--- a/src/lib/conversion/rotation.h
+++ b/src/lib/conversion/rotation.h
@@ -93,9 +93,8 @@ enum Rotation {
 	ROTATION_ROLL_270_YAW_180    = 41,
 	ROTATION_ROLL_270_YAW_270    = 42,
 	ROTATION_PITCH_90_YAW_180    = 43,
-	ROTATION_YAW_293_PITCH_68_ROLL_90 = 44,
-	ROTATION_PITCH_9_YAW_180     = 45,
-	ROTATION_PITCH_45            = 46,
+	ROTATION_PITCH_9_YAW_180     = 44,
+	ROTATION_PITCH_45            = 45,
 	ROTATION_MAX
 };
 
@@ -150,7 +149,6 @@ const rot_lookup_t rot_lookup[] = {
 	{270,   0, 180 },
 	{270,   0, 270 },
 	{  0,  90, 180 },
-	{293,  68,  90 },
 	{  0,   9, 180 },
 	{  0,  45,   0 },
 };