diff --git a/fortuna.cpp b/fortuna.cpp
index 60d8e0d..4549995 100644
--- a/fortuna.cpp
+++ b/fortuna.cpp
@@ -125,7 +125,7 @@ auto Fortuna::moar_random_data(const uint64_t& n_bytes) -> void {
 
 		uint64_t remaining{n_bytes};
 		fmt::print(stderr, "[i] fortuna: remaining {} bytes\n", remaining);
-		while (--how_many_ops > 0) {
+		while (how_many_ops-- > 0) {
 			this->random_data(Fortuna::two_pow_twenty);
 			remaining -= Fortuna::two_pow_twenty;
 			fmt::print(stderr, "[i] fortuna: remaining {} bytes\n", remaining);