diff --git a/src/basic/macro.h b/src/basic/macro.h
index 02d22de833..89bdd852a9 100644
--- a/src/basic/macro.h
+++ b/src/basic/macro.h
@@ -139,11 +139,17 @@ static inline unsigned long ALIGN_POWER2(unsigned long u) {
         return 1UL << (sizeof(u) * 8 - __builtin_clzl(u - 1UL));
 }
 
+#ifndef __COVERITY__
+#  define VOID_0 ((void)0)
+#else
+#  define VOID_0 ((void*)0)
+#endif
+
 #define ELEMENTSOF(x)                                                    \
         __extension__ (__builtin_choose_expr(                            \
                 !__builtin_types_compatible_p(typeof(x), typeof(&*(x))), \
                 sizeof(x)/sizeof((x)[0]),                                \
-                (void)0))
+                VOID_0))
 
 /*
  * STRLEN - return the length of a string literal, minus the trailing NUL byte.
@@ -181,7 +187,7 @@ static inline unsigned long ALIGN_POWER2(unsigned long u) {
                 __builtin_constant_p(_B) &&                             \
                 __builtin_types_compatible_p(typeof(_A), typeof(_B)),   \
                 ((_A) > (_B)) ? (_A) : (_B),                            \
-                (void)0))
+                VOID_0))
 
 /* takes two types and returns the size of the larger one */
 #define MAXSIZE(A, B) (sizeof(union _packed_ { typeof(A) a; typeof(B) b; }))
diff --git a/src/network/test-routing-policy-rule.c b/src/network/test-routing-policy-rule.c
index c29d134de2..3bbdd25b76 100644
--- a/src/network/test-routing-policy-rule.c
+++ b/src/network/test-routing-policy-rule.c
@@ -41,13 +41,15 @@ static void test_rule_serialization(const char *title, const char *ruleset, cons
         log_info("========== %s ==========", title);
         log_info("put:\n%s\n", ruleset);
 
-        assert_se((fd = mkostemp_safe(pattern)) >= 0);
+        fd = mkostemp_safe(pattern);
+        assert_se(fd >= 0);
         assert_se(f = fdopen(fd, "a+e"));
         assert_se(write_string_stream(f, ruleset, 0) == 0);
 
         assert_se(routing_policy_load_rules(pattern, &rules) == 0);
 
-        assert_se((fd2 = mkostemp_safe(pattern2)) >= 0);
+        fd2 = mkostemp_safe(pattern2);
+        assert_se(fd2 >= 0);
         assert_se(f2 = fdopen(fd2, "a+e"));
 
         assert_se(routing_policy_serialize_rules(rules, f2) == 0);
@@ -57,7 +59,8 @@ static void test_rule_serialization(const char *title, const char *ruleset, cons
 
         log_info("got:\n%s", buf);
 
-        assert_se((fd3 = mkostemp_safe(pattern3)) >= 0);
+        fd3 = mkostemp_safe(pattern3);
+        assert_se(fd3 >= 0);
         assert_se(f3 = fdopen(fd3, "we"));
         assert_se(write_string_stream(f3, expected ?: ruleset, 0) == 0);