diff --git a/lib/socks.c b/lib/socks.c
index f09c751fe5..57e5a50f7a 100644
--- a/lib/socks.c
+++ b/lib/socks.c
@@ -419,7 +419,7 @@ static CURLproxycode socks4_check_resp(struct socks_state *sx,
           "[SOCKS] cannot complete SOCKS4 connection to %u.%u.%u.%u:%u. (%u)"
           ", request rejected or failed.",
           resp[4], resp[5], resp[6], resp[7],
-          ((resp[2] << 8) | resp[3]), resp[1]);
+          (unsigned int)((resp[2] << 8) | resp[3]), resp[1]);
     return CURLPX_REQUEST_FAILED;
   case 92:
     failf(data,
@@ -427,7 +427,7 @@ static CURLproxycode socks4_check_resp(struct socks_state *sx,
           ", request rejected because SOCKS server cannot connect to "
           "identd on the client.",
           resp[4], resp[5], resp[6], resp[7],
-          ((resp[2] << 8) | resp[3]), resp[1]);
+          (unsigned int)((resp[2] << 8) | resp[3]), resp[1]);
     return CURLPX_IDENTD;
   case 93:
     failf(data,
@@ -435,14 +435,14 @@ static CURLproxycode socks4_check_resp(struct socks_state *sx,
           ", request rejected because the client program and identd "
           "report different user-ids.",
           resp[4], resp[5], resp[6], resp[7],
-          ((resp[2] << 8) | resp[3]), resp[1]);
+          (unsigned int)((resp[2] << 8) | resp[3]), resp[1]);
     return CURLPX_IDENTD_DIFFER;
   default:
     failf(data,
           "[SOCKS] cannot complete SOCKS4 connection to %u.%u.%u.%u:%u. (%u)"
           ", Unknown.",
           resp[4], resp[5], resp[6], resp[7],
-          ((resp[2] << 8) | resp[3]), resp[1]);
+          (unsigned int)((resp[2] << 8) | resp[3]), resp[1]);
     return CURLPX_UNKNOWN_FAIL;
   }
 }
diff --git a/tests/server/mqttd.c b/tests/server/mqttd.c
index 23eefa65aa..0a3a6ee024 100644
--- a/tests/server/mqttd.c
+++ b/tests/server/mqttd.c
@@ -521,8 +521,8 @@ static curl_socket_t mqttit(curl_socket_t fd)
 
       /* check the length of the payload */
       if((ssize_t)payload_len != (rc - 12)) {
-        logmsg("Payload length mismatch, expected %zx got %zx",
-               rc - 12, payload_len);
+        logmsg("Payload length mismatch, expected %zd got %zd",
+               rc - 12, (ssize_t)payload_len);
         goto end;
       }
       /* check the length of the client ID */
diff --git a/tests/server/sockfilt.c b/tests/server/sockfilt.c
index 61d81aeff7..94d6324251 100644
--- a/tests/server/sockfilt.c
+++ b/tests/server/sockfilt.c
@@ -1066,7 +1066,7 @@ static bool juggle(curl_socket_t *sockfdp,
       snprintf((char *)buffer, sizeof(buffer), "%s/%hu\n",
                ipv_inuse, server_port);
       buffer_len = (ssize_t)strlen((const char *)buffer);
-      snprintf(data, sizeof(data), "PORT\n%04x\n", (int)buffer_len);
+      snprintf(data, sizeof(data), "PORT\n%04x\n", (unsigned int)buffer_len);
       if(!write_stdout(data, 10))
         return FALSE;
       if(!write_stdout(buffer, buffer_len))
@@ -1143,7 +1143,7 @@ static bool juggle(curl_socket_t *sockfdp,
     nread_socket = sread(sockfd, buffer, sizeof(buffer));
 
     if(nread_socket > 0) {
-      snprintf(data, sizeof(data), "DATA\n%04x\n", (int)nread_socket);
+      snprintf(data, sizeof(data), "DATA\n%04x\n", (unsigned int)nread_socket);
       if(!write_stdout(data, 10))
         return FALSE;
       if(!write_stdout(buffer, nread_socket))