diff --git a/src/runmode-erf-file.c b/src/runmode-erf-file.c
index fca4bc9c84..31e8d26391 100644
--- a/src/runmode-erf-file.c
+++ b/src/runmode-erf-file.c
@@ -185,8 +185,8 @@ int RunModeErfFileAutoFp(void)
     }
 
     for (thread = 0; thread < (uint16_t)thread_max; thread++) {
-        snprintf(tname, sizeof(tname), "%s#%02u", thread_name_workers, thread+1);
-        snprintf(qname, sizeof(qname), "pickup%u", thread+1);
+        snprintf(tname, sizeof(tname), "%s#%02d", thread_name_workers, thread + 1);
+        snprintf(qname, sizeof(qname), "pickup%d", thread + 1);
 
         SCLogDebug("tname %s, qname %s", tname, qname);
 
diff --git a/src/runmode-pcap-file.c b/src/runmode-pcap-file.c
index 371fef8dd9..1961b1d809 100644
--- a/src/runmode-pcap-file.c
+++ b/src/runmode-pcap-file.c
@@ -198,8 +198,8 @@ int RunModeFilePcapAutoFp(void)
     }
 
     for (thread = 0; thread < (uint16_t)thread_max; thread++) {
-        snprintf(tname, sizeof(tname), "%s#%02u", thread_name_workers, thread+1);
-        snprintf(qname, sizeof(qname), "pickup%u", thread+1);
+        snprintf(tname, sizeof(tname), "%s#%02d", thread_name_workers, thread + 1);
+        snprintf(qname, sizeof(qname), "pickup%d", thread + 1);
 
         SCLogDebug("tname %s, qname %s", tname, qname);
         SCLogDebug("Assigning %s affinity to cpu %u", tname, cpu);
diff --git a/src/util-runmodes.c b/src/util-runmodes.c
index 2e1042bf18..79f19ea03e 100644
--- a/src/util-runmodes.c
+++ b/src/util-runmodes.c
@@ -207,8 +207,8 @@ int RunModeSetLiveCaptureAutoFp(ConfigIfaceParserFunc ConfigParser,
     }
 
     for (int thread = 0; thread < thread_max; thread++) {
-        snprintf(tname, sizeof(tname), "%s#%02u", thread_name_workers, thread+1);
-        snprintf(qname, sizeof(qname), "pickup%u", thread+1);
+        snprintf(tname, sizeof(tname), "%s#%02d", thread_name_workers, thread + 1);
+        snprintf(qname, sizeof(qname), "pickup%d", thread + 1);
 
         SCLogDebug("tname %s, qname %s", tname, qname);
 
@@ -452,9 +452,9 @@ int RunModeSetIPSAutoFp(ConfigIPSParserFunc ConfigParser,
 
     }
     for (int thread = 0; thread < thread_max; thread++) {
-        snprintf(tname, sizeof(tname), "%s#%02u", thread_name_workers, thread+1);
+        snprintf(tname, sizeof(tname), "%s#%02d", thread_name_workers, thread + 1);
         char qname[TM_QUEUE_NAME_MAX];
-        snprintf(qname, sizeof(qname), "pickup%u", thread+1);
+        snprintf(qname, sizeof(qname), "pickup%d", thread + 1);
 
         SCLogDebug("tname %s, qname %s", tname, qname);