diff --git a/src/libnm-std-aux/nm-std-aux.h b/src/libnm-std-aux/nm-std-aux.h
index 819f3284c..3b39a0194 100644
--- a/src/libnm-std-aux/nm-std-aux.h
+++ b/src/libnm-std-aux/nm-std-aux.h
@@ -459,13 +459,6 @@ nm_mult_clamped_u(unsigned a, unsigned b)
         (((cmp(_a, _b)) >= 0) ? _a : _b); \
     })
 
-/* evaluates to (void) if _A or _B are not constant or of different types */
-#define NM_CONST_MAX(_A, _B)                                                          \
-    (__builtin_choose_expr((__builtin_constant_p(_A) && __builtin_constant_p(_B)      \
-                            && __builtin_types_compatible_p(typeof(_A), typeof(_B))), \
-                           ((_A) > (_B)) ? (_A) : (_B),                               \
-                           ((void) 0)))
-
 /* Determine whether @x is a power of two (@x being an integer type).
  * Basically, this returns TRUE, if @x has exactly one bit set.
  * For negative values and zero, this always returns FALSE. */