diff --git a/matrix/Euler.hpp b/matrix/Euler.hpp
index 23c970b375..41d34d0a0e 100644
--- a/matrix/Euler.hpp
+++ b/matrix/Euler.hpp
@@ -56,7 +56,7 @@ public:
         if (fabs(theta_val - pi/2) < 1.0e-3) {
             phi_val = Type(0.0);
             psi_val = Type(atan2(dcm(1,2), dcm(0,2)));
-        } else if (Type(fabs(theta_val + pi/2) < Type(1.0e-3))) {
+        } else if (Type(fabs(theta_val + pi/2)) < Type(1.0e-3)) {
             phi_val = Type(0.0);
             psi_val = Type(atan2(-dcm(1,2), -dcm(0,2)));
         }