diff --git a/lib/gtp/v2/conv.c b/lib/gtp/v2/conv.c
index bfb01a2dc..3b61a7ca3 100644
--- a/lib/gtp/v2/conv.c
+++ b/lib/gtp/v2/conv.c
@@ -153,31 +153,3 @@ int ogs_gtp2_ip_to_f_teid(ogs_ip_t *ip, ogs_gtp2_f_teid_t *f_teid, int *len)
 
     return OGS_OK;
 }
-
-int ogs_gtp2_paa_to_ip(ogs_paa_t *paa, ogs_ip_t *ip)
-{
-    ogs_assert(paa);
-    ogs_assert(ip);
-
-    memset(ip, 0, sizeof *ip);
-
-    if (paa->session_type == OGS_PDU_SESSION_TYPE_IPV4V6) {
-        ip->ipv4 = 1;
-        ip->addr = paa->both.addr;
-        ip->ipv6 = 1;
-        memcpy(ip->addr6, paa->both.addr6, OGS_IPV6_LEN);
-    } else if (paa->session_type == OGS_PDU_SESSION_TYPE_IPV4) {
-        ip->ipv4 = 1;
-        ip->ipv6 = 0;
-        ip->addr = paa->addr;
-    } else if (paa->session_type == OGS_PDU_SESSION_TYPE_IPV6) {
-        ip->ipv4 = 0;
-        ip->ipv6 = 1;
-        memcpy(ip->addr6, paa->addr6, OGS_IPV6_LEN);
-    } else {
-        ogs_error("No IPv4 or IPv6");
-        return OGS_ERROR;
-    }
-
-    return OGS_OK;
-}
diff --git a/lib/gtp/v2/conv.h b/lib/gtp/v2/conv.h
index e5943a981..655e574e1 100644
--- a/lib/gtp/v2/conv.h
+++ b/lib/gtp/v2/conv.h
@@ -35,8 +35,6 @@ int ogs_gtp2_sockaddr_to_f_teid(ogs_sockaddr_t *addr, ogs_sockaddr_t *addr6,
 int ogs_gtp2_f_teid_to_ip(ogs_gtp2_f_teid_t *f_teid, ogs_ip_t *ip);
 int ogs_gtp2_ip_to_f_teid(ogs_ip_t *ip, ogs_gtp2_f_teid_t *f_teid, int *len);
 
-int ogs_gtp2_paa_to_ip(ogs_paa_t *paa, ogs_ip_t *ip);
-
 #ifdef __cplusplus
 }
 #endif
diff --git a/lib/proto/conv.c b/lib/proto/conv.c
index 62a5afa05..bfebd61ba 100644
--- a/lib/proto/conv.c
+++ b/lib/proto/conv.c
@@ -40,3 +40,32 @@ void ogs_extract_digit_from_string(char *digit, char *string)
 
     *digit = 0;
 }
+
+int ogs_paa_to_ip(const ogs_paa_t *paa, ogs_ip_t *ip)
+{
+    ogs_assert(paa);
+    ogs_assert(ip);
+
+    memset(ip, 0, sizeof *ip);
+
+    if (paa->session_type == OGS_PDU_SESSION_TYPE_IPV4V6) {
+        ip->ipv4 = 1;
+        ip->addr = paa->both.addr;
+        ip->ipv6 = 1;
+        memcpy(ip->addr6, paa->both.addr6, OGS_IPV6_LEN);
+    } else if (paa->session_type == OGS_PDU_SESSION_TYPE_IPV4) {
+        ip->ipv4 = 1;
+        ip->ipv6 = 0;
+        ip->addr = paa->addr;
+    } else if (paa->session_type == OGS_PDU_SESSION_TYPE_IPV6) {
+        ip->ipv4 = 0;
+        ip->ipv6 = 1;
+        memcpy(ip->addr6, paa->addr6, OGS_IPV6_LEN);
+    } else {
+        ogs_error("No IPv4 or IPv6");
+        return OGS_ERROR;
+    }
+
+    return OGS_OK;
+}
+
diff --git a/lib/proto/conv.h b/lib/proto/conv.h
index 7f7578db5..ec16beace 100644
--- a/lib/proto/conv.h
+++ b/lib/proto/conv.h
@@ -30,6 +30,8 @@ extern "C" {
 
 void ogs_extract_digit_from_string(char *digit, char *string);
 
+int ogs_paa_to_ip(const ogs_paa_t *paa, ogs_ip_t *ip);
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/src/mme/mme-s11-handler.c b/src/mme/mme-s11-handler.c
index a2477cbb7..0d140253d 100644
--- a/src/mme/mme-s11-handler.c
+++ b/src/mme/mme-s11-handler.c
@@ -376,7 +376,7 @@ void mme_s11_handle_create_session_response(
                 rsp->pdn_address_allocation.len);
         session->session_type = session->paa.session_type;
         ogs_assert(OGS_OK ==
-                ogs_gtp2_paa_to_ip(&session->paa, &session->ue_ip));
+                ogs_paa_to_ip(&session->paa, &session->ue_ip));
     }
 
     /* ePCO */
diff --git a/src/smf/gn-build.c b/src/smf/gn-build.c
index 02bd52482..d05b4e177 100644
--- a/src/smf/gn-build.c
+++ b/src/smf/gn-build.c
@@ -174,7 +174,7 @@ ogs_pkbuf_t *smf_gn_build_create_pdp_context_response(
     rsp->charging_id.u32 = sess->charging.id;
 
     /* End User Address */
-    rv = ogs_gtp2_paa_to_ip(&sess->session.paa, &ip_eua);
+    rv = ogs_paa_to_ip(&sess->session.paa, &ip_eua);
     rv = ogs_gtp1_ip_to_eua(sess->session.session_type, &ip_eua, &eua,
             &eua_len);
     rsp->end_user_address.presence = 1;
diff --git a/src/smf/s5c-handler.c b/src/smf/s5c-handler.c
index ea6cf8d41..857c473d6 100644
--- a/src/smf/s5c-handler.c
+++ b/src/smf/s5c-handler.c
@@ -247,7 +247,7 @@ uint8_t smf_s5c_handle_create_session_request(
 
     /* Initially Set Session Type from UE */
     sess->session.session_type = sess->ue_session_type;
-    rv = ogs_gtp2_paa_to_ip(paa, &sess->session.ue_ip);
+    rv = ogs_paa_to_ip(paa, &sess->session.ue_ip);
     ogs_assert(rv == OGS_OK);
 
     /* Set UE IP Address */