diff --git a/include/sys/zvol.h b/include/sys/zvol.h
index 00ed220d3b..2fb20fbf94 100644
--- a/include/sys/zvol.h
+++ b/include/sys/zvol.h
@@ -32,6 +32,9 @@
 #define	ZVOL_OBJ		1ULL
 #define	ZVOL_ZAP_OBJ		2ULL
 
+#define	SPEC_MAXOFFSET_T	((1LL << ((NBBY * sizeof (daddr32_t)) + \
+				DEV_BSHIFT - 1)) - 1)
+
 extern void *zvol_tag;
 
 extern void zvol_create_minors(spa_t *spa, const char *name, boolean_t async);
diff --git a/module/zfs/zvol.c b/module/zfs/zvol.c
index b5169baf48..ea6997b5b9 100644
--- a/module/zfs/zvol.c
+++ b/module/zfs/zvol.c
@@ -281,7 +281,7 @@ zvol_check_volsize(uint64_t volsize, uint64_t blocksize)
 		return (SET_ERROR(EINVAL));
 
 #ifdef _ILP32
-	if (volsize - 1 > MAXOFFSET_T)
+	if (volsize - 1 > SPEC_MAXOFFSET_T)
 		return (SET_ERROR(EOVERFLOW));
 #endif
 	return (0);