diff --git a/common/src/packet.cpp b/common/src/packet.cpp
index 2784ac5..d93543e 100644
--- a/common/src/packet.cpp
+++ b/common/src/packet.cpp
@@ -64,7 +64,7 @@ static inline const char *parse_vxlan(struct packet *handler, const char *data,
 static inline const char *parse_gtpv1_u(struct packet *handler, const char *data, uint16_t len);
 // L3/L4
 static inline const char *parse_l3(struct packet *handler, uint16_t next_proto, const char *data, uint16_t len);
-static inline const char *parse_l4(struct packet *handler, uint16_t next_proto, const char *data, uint16_t len);
+static inline const char *parse_l4(struct packet *handler, uint8_t next_proto, const char *data, uint16_t len);
 
 /******************************************************************************
  * Private API -- Utils
@@ -785,7 +785,7 @@ static inline const char *parse_ipv4(struct packet *handler, const char *data, u
         return data;
     }
     struct ip *hdr = (struct ip *)data;
-    uint16_t next_proto = hdr->ip_p;
+    uint8_t next_proto = hdr->ip_p;
     uint16_t hdr_len = (hdr->ip_hl & 0xf) * 4u;
     SET_LAYER(handler, layer, LAYER_TYPE_IPV4, hdr_len, data, len);
 
@@ -805,7 +805,7 @@ static inline const char *parse_ipv6(struct packet *handler, const char *data, u
     {
         return data;
     }
-    uint16_t next_proto = ((struct ip6_hdr *)data)->ip6_nxt;
+    uint8_t next_proto = ((struct ip6_hdr *)data)->ip6_nxt;
     SET_LAYER(handler, layer, LAYER_TYPE_IPV6, sizeof(struct ip6_hdr), data, len);
 
     return parse_l4(handler, next_proto, layer->pld_ptr, layer->pld_len);
@@ -971,7 +971,7 @@ static inline const char *parse_l3(struct packet *handler, uint16_t next_proto,
     }
 }
 
-static inline const char *parse_l4(struct packet *handler, uint16_t next_proto, const char *data, uint16_t len)
+static inline const char *parse_l4(struct packet *handler, uint8_t next_proto, const char *data, uint16_t len)
 {
     switch (next_proto)
     {