diff --git a/firmware/controllers/algo/fuel_math.cpp b/firmware/controllers/algo/fuel_math.cpp
index c0dde746ef..5f19441c5e 100644
--- a/firmware/controllers/algo/fuel_math.cpp
+++ b/firmware/controllers/algo/fuel_math.cpp
@@ -265,8 +265,16 @@ float getInjectionModeDurationMultiplier(DECLARE_ENGINE_PARAMETER_SIGNATURE) {
 	injection_mode_e mode = ENGINE(getCurrentInjectionMode(PASS_ENGINE_PARAMETER_SIGNATURE));
 
 	switch (mode) {
-	case IM_SIMULTANEOUS:
-		return 1.0f / engineConfiguration->specs.cylindersCount;
+	case IM_SIMULTANEOUS: {
+		auto cylCount = engineConfiguration->specs.cylindersCount;
+
+		if (cylCount == 0) {
+			// we can end up here during configuration reset
+			return 0;
+		}
+
+		return 1.0f / cylCount;
+	}
 	case IM_SEQUENTIAL:
 	case IM_SINGLE_POINT:
 		return 1;