diff --git a/src/lib/conversion/rotation.cpp b/src/lib/conversion/rotation.cpp
index 872f22ec4a..26bfc4d9ef 100644
--- a/src/lib/conversion/rotation.cpp
+++ b/src/lib/conversion/rotation.cpp
@@ -249,5 +249,11 @@ rotate_3f(enum Rotation rot, float &x, float &y, float &z)
 			z = -0.932324f * tmpx +  0.361625f * tmpy +  0.000000f * tmpz;
 			return;
 		}
+
+	case ROTATION_PITCH_90_ROLL_270: {
+			tmp = x; x = -y;
+			y = z; z = -tmp;
+			return;
+		}
 	}
 }
diff --git a/src/lib/conversion/rotation.h b/src/lib/conversion/rotation.h
index 09336c15e0..1e1cdce268 100644
--- a/src/lib/conversion/rotation.h
+++ b/src/lib/conversion/rotation.h
@@ -79,6 +79,7 @@ enum Rotation {
 	ROTATION_PITCH_90_YAW_180    = 28,
 	ROTATION_PITCH_90_ROLL_90	 = 29,
 	ROTATION_YAW_293_PITCH_68_ROLL_90 = 30,
+	ROTATION_PITCH_90_ROLL_270	 = 31,
 	ROTATION_MAX
 };
 
@@ -120,6 +121,7 @@ const rot_lookup_t rot_lookup[] = {
 	{  0,  90, 180 },
 	{ 90,  90,   0 },
 	{ 90,  68, 293 },
+	{270,  90,   0 },
 };
 
 /**