diff --git a/src/util/virpci.c b/src/util/virpci.c
index a0da1cd005e80d8f2fa3ee0b74e24df0bf943da2..85cd6948d721ea2f48cad5d50b26d7b43f5c8b48 100644
--- a/src/util/virpci.c
+++ b/src/util/virpci.c
@@ -2026,8 +2026,8 @@ virPCIGetVirtualFunctions(const char *sysfs_path,
                 continue;
             }
 
-            if (VIR_ALLOC_N(*virtual_functions,
-                            *num_virtual_functions + 1) < 0) {
+            if (VIR_REALLOC_N(*virtual_functions,
+                              *num_virtual_functions + 1) < 0) {
                 virReportOOMError();
                 VIR_FREE(config_addr);
                 goto error;