diff --git a/src/main.c b/src/main.c
index 1efb723..42669f9 100644
--- a/src/main.c
+++ b/src/main.c
@@ -340,11 +340,11 @@ int main () {
   // Hash the seeds to ensure they're random enough
   world_seed = splitmix64(world_seed);
   printf("World seed: ");
-  for (int i = 0; i < 4; i ++) printf("%X", (world_seed >> (8 * i)) & 255);
+  for (int i = 0; i < 4; i ++) printf("%X", (unsigned int)((world_seed >> (8 * i)) & 255));
 
   rng_seed = splitmix64(rng_seed);
   printf("\nRNG seed: ");
-  for (int i = 0; i < 4; i ++) printf("%X", (rng_seed >> (8 * i)) & 255);
+  for (int i = 0; i < 4; i ++) printf("%X", (unsigned int)((rng_seed >> (8 * i)) & 255));
   printf("\n\n");
 
   for (int i = 0; i < sizeof(block_changes) / sizeof(BlockChange); i ++) {