diff --git a/duel.cpp b/duel.cpp
index 50d5190a..a30b87c3 100644
--- a/duel.cpp
+++ b/duel.cpp
@@ -131,13 +131,13 @@ void duel::set_response(const void* resp, size_t len) {
 }
 // uniform integer distribution
 int32_t duel::get_next_integer(int32_t l, int32_t h) {
-	const int32_t range = h - l + 1;
-	const int32_t lim = random.max() % range;
-	int32_t n;
+	const uint32_t range = h - l + 1;
+	const uint32_t lim = random.max() % range;
+	uint32_t n;
 	do {
-		n = random();
+		n = static_cast<uint32_t>(random());
 	} while(n <= lim);
-	return static_cast<int32_t>((n % range) + l);
+	return static_cast<int32_t>(n % range) + l;
 }
 duel::duel_message* duel::new_message(uint8_t message) {
 	return &(messages.emplace_back(message));