diff --git a/src/lib/launchdetection/LaunchDetector.cpp b/src/lib/launchdetection/LaunchDetector.cpp
index 24f2953426..6bcae85344 100644
--- a/src/lib/launchdetection/LaunchDetector.cpp
+++ b/src/lib/launchdetection/LaunchDetector.cpp
@@ -66,7 +66,7 @@ LaunchDetector::~LaunchDetector()
 void LaunchDetector::reset()
 {
 	/* Reset all detectors */
-	for (uint8_t i = 0; i < sizeof(launchMethods)/sizeof(LaunchMethod *); i++) {
+	for (unsigned i = 0; i < (sizeof(launchMethods) / sizeof(launchMethods[0])); i++) {
 		launchMethods[i]->reset();
 	}
 
@@ -79,7 +79,7 @@ void LaunchDetector::reset()
 void LaunchDetector::update(float accel_x)
 {
 	if (launchdetection_on.get() == 1) {
-		for (uint8_t i = 0; i < sizeof(launchMethods)/sizeof(LaunchMethod *); i++) {
+		for (unsigned i = 0; i < (sizeof(launchMethods) / sizeof(launchMethods[0])); i++) {
 			launchMethods[i]->update(accel_x);
 		}
 	}
@@ -90,7 +90,7 @@ LaunchDetectionResult LaunchDetector::getLaunchDetected()
 	if (launchdetection_on.get() == 1) {
 		if (activeLaunchDetectionMethodIndex < 0) {
 		/* None of the active launchmethods has detected a launch, check all launchmethods */
-			for (uint8_t i = 0; i < sizeof(launchMethods)/sizeof(LaunchMethod *); i++) {
+			for (unsigned i = 0; i < (sizeof(launchMethods) / sizeof(launchMethods[0])); i++) {
 				if(launchMethods[i]->getLaunchDetected() != LAUNCHDETECTION_RES_NONE) {
 					warnx("selecting launchmethod %d", i);
 					activeLaunchDetectionMethodIndex = i; // from now on only check this method