diff --git a/src/core/include/mp-units/bits/external/hacks.h b/src/core/include/mp-units/bits/external/hacks.h
index 009b2059a..34479a346 100644
--- a/src/core/include/mp-units/bits/external/hacks.h
+++ b/src/core/include/mp-units/bits/external/hacks.h
@@ -107,7 +107,7 @@
 
 #endif
 
-#if MP_UNITS_COMP_CLANG
+#if MP_UNITS_COMP_CLANG < 17
 
 #define MP_UNITS_CONSTEVAL constexpr