diff --git a/sys/dev/isl/isl.c b/sys/dev/isl/isl.c
--- a/sys/dev/isl/isl.c
+++ b/sys/dev/isl/isl.c
@@ -202,7 +202,7 @@
 	if (use_als) {
 		SYSCTL_ADD_PROC(sysctl_ctx,
 		    SYSCTL_CHILDREN(sysctl_tree), OID_AUTO, "als",
-		    CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_NEEDGIANT, sc,
+		    CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_MPSAFE, sc,
 		    ISL_METHOD_ALS, isl_sysctl, "I",
 		    "Current ALS sensor read-out");
 	}
@@ -210,7 +210,7 @@
 	if (use_ir) {
 		SYSCTL_ADD_PROC(sysctl_ctx,
 		    SYSCTL_CHILDREN(sysctl_tree), OID_AUTO, "ir",
-		    CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_NEEDGIANT, sc,
+		    CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_MPSAFE, sc,
 		    ISL_METHOD_IR, isl_sysctl, "I",
 		    "Current IR sensor read-out");
 	}
@@ -218,20 +218,20 @@
 	if (use_prox) {
 		SYSCTL_ADD_PROC(sysctl_ctx,
 		    SYSCTL_CHILDREN(sysctl_tree), OID_AUTO, "prox",
-		    CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_NEEDGIANT, sc,
+		    CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_MPSAFE, sc,
 		    ISL_METHOD_PROX, isl_sysctl, "I",
 		    "Current proximity sensor read-out");
 	}
 
 	SYSCTL_ADD_PROC(sysctl_ctx,
 	    SYSCTL_CHILDREN(sysctl_tree), OID_AUTO, "resolution",
-	    CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_NEEDGIANT, sc,
+	    CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_MPSAFE, sc,
 	    ISL_METHOD_RESOLUTION, isl_sysctl, "I",
 	    "Current proximity sensor resolution");
 
 	SYSCTL_ADD_PROC(sysctl_ctx,
 	    SYSCTL_CHILDREN(sysctl_tree), OID_AUTO, "range",
-	    CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_NEEDGIANT, sc,
+	    CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_MPSAFE, sc,
 	    ISL_METHOD_RANGE, isl_sysctl, "I",
 	    "Current proximity sensor range");