diff --git a/lib/libspl/include/assert.h b/lib/libspl/include/assert.h
index 7f145b89a3..ace72fb35b 100644
--- a/lib/libspl/include/assert.h
+++ b/lib/libspl/include/assert.h
@@ -65,13 +65,11 @@ extern void __assert(const char *, const char *, int);
 
 /* BEGIN CSTYLED */
 #define	VERIFY3_IMPL(LEFT, OP, RIGHT, TYPE) do { \
-	const TYPE __left = (TYPE)(LEFT); \
-	const TYPE __right = (TYPE)(RIGHT); \
-	if (!(__left OP __right)) { \
+	if (!((TYPE)(LEFT) OP (TYPE)(RIGHT))) { \
 		char *__buf = alloca(256); \
 		(void) snprintf(__buf, 256, "%s %s %s (0x%llx %s 0x%llx)", \
 			#LEFT, #OP, #RIGHT, \
-			(u_longlong_t)__left, #OP, (u_longlong_t)__right); \
+			(u_longlong_t)(LEFT), #OP, (u_longlong_t)(RIGHT)); \
 		__assert(__buf, __FILE__, __LINE__); \
 	} \
 } while (0)