diff --git a/src/lxc/lxc_controller.c b/src/lxc/lxc_controller.c
index 52d382ec1e..51488e755c 100644
--- a/src/lxc/lxc_controller.c
+++ b/src/lxc/lxc_controller.c
@@ -210,7 +210,7 @@ static int lxcSetupLoopDevices(virDomainDefPtr def, size_t *nloopDevs, int **loo
             virReportOOMError();
             goto cleanup;
         }
-        (*loopDevs)[*nloopDevs++] = fd;
+        (*loopDevs)[(*nloopDevs)++] = fd;
     }
 
     VIR_DEBUG("Setup all loop devices");