diff --git a/src/detect-engine-sigorder.c b/src/detect-engine-sigorder.c
index 9e3d819fbc..1186636f5e 100644
--- a/src/detect-engine-sigorder.c
+++ b/src/detect-engine-sigorder.c
@@ -199,6 +199,7 @@ static inline int SCSigGetFlowintType(Signature *sig)
                 fi->modifier == FLOWINT_MODIFIER_NE ||
                 fi->modifier == FLOWINT_MODIFIER_GE ||
                 fi->modifier == FLOWINT_MODIFIER_GT ||
+                fi->modifier == FLOWINT_MODIFIER_NOTSET ||
                 fi->modifier == FLOWINT_MODIFIER_ISSET) {
                 read++;
             } else {