diff --git a/src/@epicell/rot2eulerZXZ.m b/src/@epicell/rot2eulerZXZ.m
index 1e4c3e712ddf32ecf37c649fea554036a0b51ffe..75c41407845cd1b1135c3869a2f02280038fbfd6 100644
--- a/src/@epicell/rot2eulerZXZ.m
+++ b/src/@epicell/rot2eulerZXZ.m
@@ -1,6 +1,9 @@
 function[ E, E_deg ] = rot2eulerZXZ( R )
 %ROT2EULERZXZ Convert rotation matrix to ZX'Z' Euler angles.
 
+    r11 = R( 1, 1 );
+    r12 = R( 1, 2 );
+
     r13 = R( 1, 3 );
     r31 = R( 3, 1 );
     r22 = R( 2, 2 );