diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index 9e0f204e44..056b5cec98 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -18420,6 +18420,7 @@ qemuDomainGetGuestVcpusParams(virTypedParameterPtr *params,
         goto cleanup; \
     if (virTypedParamsAddString(&par, &npar, &maxpar, #name, tmp) < 0) \
         goto cleanup; \
+    VIR_FREE(tmp)
 
     ADD_BITMAP(vcpus);
     ADD_BITMAP(online);