diff --git a/runtime/test/zserio/TypesTest.cpp b/runtime/test/zserio/TypesTest.cpp
index 7afbcf4..175301c 100644
--- a/runtime/test/zserio/TypesTest.cpp
+++ b/runtime/test/zserio/TypesTest.cpp
@@ -49,7 +49,7 @@ void testIntOperators(typename T::value_type minValue = NumericLimits<T>::min())
     Int64 value = +valueMin;
     value = -valueMin;
     value = valueMin + valueMax;
-    value = valueMax - valueMin;
+    value = valueMax - value0;
     value = value0 * valueMax;
     if (valueMax != 0) // == 0 for Int1
     {