diff --git a/src/Utilities.cpp b/src/Utilities.cpp
index 59f26368a98fdcfd6276a48982ddba06d9f640c6..ce1d84b5e32b6dfc1461af8fce4c22c864d38dcf 100644
--- a/src/Utilities.cpp
+++ b/src/Utilities.cpp
@@ -807,6 +807,8 @@ std::vector<double> getDistortionCoeffs(json isd, csm::WarningList *list) {
               "Utilities::getDistortion()"));
         }
         coefficients = std::vector<double>(20, 0.0);
+        coefficients[1] = 1.0;
+        coefficients[12] = 1.0;
       }
     }
     break;