diff --git a/src/conf/domain_capabilities.c b/src/conf/domain_capabilities.c
index 9167fba7c9..54066e0b03 100644
--- a/src/conf/domain_capabilities.c
+++ b/src/conf/domain_capabilities.c
@@ -167,7 +167,7 @@ virDomainCapsCPUModelsCopy(virDomainCapsCPUModelsPtr old)
 
     for (i = 0; i < old->nmodels; i++) {
         if (virDomainCapsCPUModelsAdd(cpuModels,
-                                      old->models[i].name, -1,
+                                      old->models[i].name,
                                       old->models[i].usable,
                                       old->models[i].blockers) < 0)
             goto error;
@@ -200,7 +200,7 @@ virDomainCapsCPUModelsFilter(virDomainCapsCPUModelsPtr old,
             continue;
 
         if (virDomainCapsCPUModelsAdd(cpuModels,
-                                      old->models[i].name, -1,
+                                      old->models[i].name,
                                       old->models[i].usable,
                                       old->models[i].blockers) < 0)
             goto error;
@@ -238,15 +238,13 @@ virDomainCapsCPUModelsAddSteal(virDomainCapsCPUModelsPtr cpuModels,
 int
 virDomainCapsCPUModelsAdd(virDomainCapsCPUModelsPtr cpuModels,
                           const char *name,
-                          ssize_t nameLen,
                           virDomainCapsCPUUsable usable,
                           char **blockers)
 {
     g_autofree char * nameCopy = NULL;
     VIR_AUTOSTRINGLIST blockersCopy = NULL;
 
-    if (VIR_STRNDUP(nameCopy, name, nameLen) < 0)
-        return -1;
+    nameCopy = g_strdup(name);
 
     if (virStringListCopy(&blockersCopy, (const char **)blockers) < 0)
         return -1;
diff --git a/src/conf/domain_capabilities.h b/src/conf/domain_capabilities.h
index 6b27eac11f..8bfc6ccccb 100644
--- a/src/conf/domain_capabilities.h
+++ b/src/conf/domain_capabilities.h
@@ -203,7 +203,6 @@ int virDomainCapsCPUModelsAddSteal(virDomainCapsCPUModelsPtr cpuModels,
                                    char ***blockers);
 int virDomainCapsCPUModelsAdd(virDomainCapsCPUModelsPtr cpuModels,
                               const char *name,
-                              ssize_t nameLen,
                               virDomainCapsCPUUsable usable,
                               char **blockers);
 virDomainCapsCPUModelPtr
diff --git a/src/qemu/qemu_capabilities.c b/src/qemu/qemu_capabilities.c
index b03abcd0d3..6338f37c02 100644
--- a/src/qemu/qemu_capabilities.c
+++ b/src/qemu/qemu_capabilities.c
@@ -1873,7 +1873,7 @@ virQEMUCapsAddCPUDefinitions(virQEMUCapsPtr qemuCaps,
     }
 
     for (i = 0; i < count; i++) {
-        if (virDomainCapsCPUModelsAdd(cpus, name[i], -1, usable, NULL) < 0)
+        if (virDomainCapsCPUModelsAdd(cpus, name[i], usable, NULL) < 0)
             return -1;
     }
 
diff --git a/tests/cputest.c b/tests/cputest.c
index 666265bc06..18c8e8b09c 100644
--- a/tests/cputest.c
+++ b/tests/cputest.c
@@ -845,7 +845,7 @@ cpuTestUpdateLive(const void *arg)
             usable = hvModel->usable;
         }
 
-        if (virDomainCapsCPUModelsAdd(models, expected->model, -1,
+        if (virDomainCapsCPUModelsAdd(models, expected->model,
                                       usable, blockers) < 0)
             goto cleanup;
 
@@ -954,7 +954,7 @@ cpuTestInitModels(const char **list)
         return NULL;
 
     for (model = list; *model; model++) {
-        if (virDomainCapsCPUModelsAdd(cpus, *model, -1,
+        if (virDomainCapsCPUModelsAdd(cpus, *model,
                                       VIR_DOMCAPS_CPU_USABLE_UNKNOWN, NULL) < 0)
             goto error;
     }