diff --git a/firmware/controllers/math/config_engine_specs.h b/firmware/controllers/math/config_engine_specs.h
index 4284d1e990..e4287d0171 100644
--- a/firmware/controllers/math/config_engine_specs.h
+++ b/firmware/controllers/math/config_engine_specs.h
@@ -36,6 +36,7 @@
 
 #define get_operationMode CONFIG_ACCESS_FOR_CONFIG_HEADER_ONLY(operationMode)
 #define get_specs_displacement CONFIG_ACCESS_FOR_CONFIG_HEADER_ONLY(specs.displacement)
+#define get_specs_cylindersCount CONFIG_ACCESS_FOR_CONFIG_HEADER_ONLY(specs.cylindersCount)
 #define get_injector_flow CONFIG_ACCESS_FOR_CONFIG_HEADER_ONLY(injector.flow)
 
 #endif /* CONTROLLERS_MATH_CONFIG_ENGINE_SPECS_H_ */
diff --git a/firmware/controllers/math/speed_density.cpp b/firmware/controllers/math/speed_density.cpp
index cf0f29d21a..e70e1b830e 100644
--- a/firmware/controllers/math/speed_density.cpp
+++ b/firmware/controllers/math/speed_density.cpp
@@ -89,7 +89,7 @@ static float getCycleAirMass(float volumetricEfficiency, float MAP, float tempK
 
 float getCylinderAirMass(float volumetricEfficiency, float MAP, float tempK DECLARE_GLOBAL_SUFFIX) {
 	return getCycleAirMass(volumetricEfficiency, MAP, tempK PASS_GLOBAL_SUFFIX)
-			/ get_specs_displacement;
+			/ get_specs_cylindersCount;
 }
 
 /**
diff --git a/unit_tests/main.cpp b/unit_tests/main.cpp
index 4339dc4e05..6c9aeba332 100644
--- a/unit_tests/main.cpp
+++ b/unit_tests/main.cpp
@@ -57,6 +57,7 @@ GTEST_API_ int main(int argc, char **argv) {
 	// uncomment if you only want to run selected tests
 	//::testing::GTEST_FLAG(filter) = "*testFasterEngineSpinningUp*";
 	int result = RUN_ALL_TESTS();
+	// windows ERRORLEVEL in Jenkins batch file seems to want negative value to detect failure
 	return result == 0 ? 0 : -1;
 }