diff --git a/debug.hpp b/debug.hpp
index 98517a75..01053efe 100644
--- a/debug.hpp
+++ b/debug.hpp
@@ -32,8 +32,10 @@
 // (more) macros.
 #if !defined(NDEBUG)
     constexpr bool debug_enabled = true;
+    constexpr bool assertions_enabled = true;
 #else
     constexpr bool debug_enabled = false;
+    constexpr bool assertions_enabled = false;
 #endif