diff --git a/src/lib/conversion/rotation.cpp b/src/lib/conversion/rotation.cpp
index 062de4dad5..00ce40dd01 100644
--- a/src/lib/conversion/rotation.cpp
+++ b/src/lib/conversion/rotation.cpp
@@ -294,5 +294,13 @@ rotate_3f(enum Rotation rot, float &x, float &y, float &z)
 			y = -tmp;
 			return;
 		}
+
+	case ROTATION_ROLL_270_YAW_180: {
+			x = -x;
+			tmp = y;
+			y = -z;
+			z = -tmp;
+			return;
+		}
 	}
 }
diff --git a/src/lib/conversion/rotation.h b/src/lib/conversion/rotation.h
index 71d36ed62f..b8ecf8f111 100644
--- a/src/lib/conversion/rotation.h
+++ b/src/lib/conversion/rotation.h
@@ -85,6 +85,7 @@ enum Rotation {
 	ROTATION_PITCH_45 = 33,
 	ROTATION_PITCH_315 = 34,
 	ROTATION_ROLL_90_YAW_270 = 35,
+	ROTATION_ROLL_270_YAW_180 = 41,
 	ROTATION_MAX
 };
 
@@ -131,6 +132,7 @@ const rot_lookup_t rot_lookup[] = {
 	{ 0,   45,   0 },
 	{ 0,  315,   0 },
 	{ 90,   0, 270 },
+	{270,   0, 180 },
 };
 
 /**