diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
index 90dbabd76d..e8cda6ca28 100644
--- a/src/conf/domain_conf.c
+++ b/src/conf/domain_conf.c
@@ -16876,23 +16876,6 @@ virDomainEmulatorPinDel(virDomainDefPtr def)
     return 0;
 }
 
-void
-virDomainIOThreadsPinDel(virDomainDefPtr def,
-                         unsigned int iothread_id)
-{
-    size_t i;
-    virDomainPinDefPtr *iothreadspin_list = def->cputune.iothreadspin;
-
-    for (i = 0; i < def->cputune.niothreadspin; i++) {
-        if (iothreadspin_list[i]->id == iothread_id) {
-            virBitmapFree(iothreadspin_list[i]->cpumask);
-            VIR_DELETE_ELEMENT(def->cputune.iothreadspin, i,
-                               def->cputune.niothreadspin);
-            return;
-        }
-    }
-}
-
 static int
 virDomainEventActionDefFormat(virBufferPtr buf,
                               int type,
diff --git a/src/conf/domain_conf.h b/src/conf/domain_conf.h
index 3b32c8d5b2..4b437b440c 100644
--- a/src/conf/domain_conf.h
+++ b/src/conf/domain_conf.h
@@ -2573,9 +2573,6 @@ int virDomainEmulatorPinAdd(virDomainDefPtr def,
 
 int virDomainEmulatorPinDel(virDomainDefPtr def);
 
-void virDomainIOThreadsPinDel(virDomainDefPtr def,
-                              unsigned int iothread_id);
-
 void virDomainRNGDefFree(virDomainRNGDefPtr def);
 
 bool virDomainDiskDefDstDuplicates(virDomainDefPtr def);
diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms
index adbdece076..1fb42ac364 100644
--- a/src/libvirt_private.syms
+++ b/src/libvirt_private.syms
@@ -312,7 +312,6 @@ virDomainHubTypeToString;
 virDomainHypervTypeFromString;
 virDomainHypervTypeToString;
 virDomainInputDefFree;
-virDomainIOThreadsPinDel;
 virDomainLeaseDefFree;
 virDomainLeaseIndex;
 virDomainLeaseInsert;