diff --git a/generator.cpp b/generator.cpp
index 70fa51d..01c0e39 100644
--- a/generator.cpp
+++ b/generator.cpp
@@ -138,6 +138,9 @@ auto Generator::generate_blocks(unsigned int k_blocks) -> std::string {
 	std::lock_guard<std::recursive_mutex> lg(mtx);
 
 	assert((G.ctr != 0) && "Counter is not 0, generator has been seeded");
+	if (!this->is_seeded()) {
+		throw std::logic_error("G.ctr == 0, generator has not been seeded!");
+	}
 
 	std::string r{""};
 	while (k_blocks--) {