diff --git a/src/nm-ip4-config.c b/src/nm-ip4-config.c
index 3208a16447..345a92cf6a 100644
--- a/src/nm-ip4-config.c
+++ b/src/nm-ip4-config.c
@@ -913,10 +913,10 @@ nm_ip4_config_diff (NMIP4Config *a, NMIP4Config *b)
 	NMIP4ConfigPrivate *b_priv;
 	NMIP4ConfigCompareFlags flags = NM_IP4_COMPARE_FLAG_NONE;
 
-	if ((a && !b) || (b && !a))
-		return NM_IP4_COMPARE_FLAG_ALL;
 	if (!a && !b)
 		return NM_IP4_COMPARE_FLAG_NONE;
+	if (!a || !b)
+		return NM_IP4_COMPARE_FLAG_ALL;
 
 	a_priv = NM_IP4_CONFIG_GET_PRIVATE (a);
 	b_priv = NM_IP4_CONFIG_GET_PRIVATE (b);
diff --git a/src/nm-ip6-config.c b/src/nm-ip6-config.c
index 453f7f134d..24b9f1f0c9 100644
--- a/src/nm-ip6-config.c
+++ b/src/nm-ip6-config.c
@@ -852,10 +852,10 @@ nm_ip6_config_diff (NMIP6Config *a, NMIP6Config *b)
 	NMIP6ConfigPrivate *b_priv;
 	NMIP6ConfigCompareFlags flags = NM_IP6_COMPARE_FLAG_NONE;
 
-	if ((a && !b) || (b && !a))
-		return NM_IP6_COMPARE_FLAG_ALL;
 	if (!a && !b)
 		return NM_IP6_COMPARE_FLAG_NONE;
+	if (!a || !b)
+		return NM_IP6_COMPARE_FLAG_ALL;
 
 	a_priv = NM_IP6_CONFIG_GET_PRIVATE (a);
 	b_priv = NM_IP6_CONFIG_GET_PRIVATE (b);