diff --git a/lib/alloc/realloc.h b/lib/alloc/realloc.h
index fd31ab89..63f14dc2 100644
--- a/lib/alloc/realloc.h
+++ b/lib/alloc/realloc.h
@@ -13,7 +13,7 @@
 
 #define REALLOC(p, n, type)                                                   \
 (                                                                             \
-	_Generic(p, type *:  (type *) reallocarray(p, n, sizeof(type)))       \
+	_Generic(p, type *: (type *) reallocarray(p, (n) ?: 1, sizeof(type))) \
 )
 
 
diff --git a/lib/alloc/reallocf.h b/lib/alloc/reallocf.h
index 5854330a..2d328b6a 100644
--- a/lib/alloc/reallocf.h
+++ b/lib/alloc/reallocf.h
@@ -16,7 +16,7 @@
 
 #define REALLOCF(p, n, type)                                                  \
 (                                                                             \
-	_Generic(p, type *:  (type *) reallocarrayf(p, n, sizeof(type)))      \
+	_Generic(p, type *: (type *) reallocarrayf(p, (n) ?: 1, sizeof(type)))\
 )
 
 
@@ -30,10 +30,9 @@ reallocarrayf(void *p, size_t nmemb, size_t size)
 {
 	void  *q;
 
-	q = reallocarray(p, nmemb, size);
+	q = reallocarray(p, nmemb ?: 1, size ?: 1);
 
-	/* realloc(p, 0) is equivalent to free(p);  avoid double free.  */
-	if (q == NULL && nmemb != 0 && size != 0)
+	if (q == NULL)
 		free(p);
 	return q;
 }