diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
index 6dba478900724d2f5e9de4ab3a69c0b155213446..9f34b7008b86316fbcfc59c1fa9d5c297c306be1 100644
--- a/src/conf/domain_conf.c
+++ b/src/conf/domain_conf.c
@@ -8858,7 +8858,7 @@ virDomainControllerDefParseXML(virDomainXMLOption *xmlopt,
             unsigned long long bytes;
             if ((rc = virParseScaledValue("./pcihole64", NULL,
                                           ctxt, &bytes, 1024,
-                                          1024ULL * ULONG_MAX, false)) < 0)
+                                          ULLONG_MAX, false)) < 0)
                 return NULL;
 
             if (rc == 1)
@@ -23589,8 +23589,8 @@ virDomainControllerDefFormat(virBuffer *buf,
 
     if (def->type == VIR_DOMAIN_CONTROLLER_TYPE_PCI &&
         def->opts.pciopts.pcihole64) {
-        virBufferAsprintf(&childBuf, "<pcihole64 unit='KiB'>%lu</"
-                          "pcihole64>\n", def->opts.pciopts.pcihole64size);
+        virBufferAsprintf(&childBuf, "<pcihole64 unit='KiB'>%llu</pcihole64>\n",
+                          def->opts.pciopts.pcihole64size);
     }
 
     virXMLFormatElement(buf, "controller", &attrBuf, &childBuf);
diff --git a/src/conf/domain_conf.h b/src/conf/domain_conf.h
index 2b40515e772a3910cd71e6b04b9127a1e75d2394..d46d35ba7dfca8ca0a94a617ec4f24e328594f05 100644
--- a/src/conf/domain_conf.h
+++ b/src/conf/domain_conf.h
@@ -747,7 +747,7 @@ struct _virDomainVirtioSerialOpts {
 
 struct _virDomainPCIControllerOpts {
     bool pcihole64;
-    unsigned long pcihole64size;
+    unsigned long long pcihole64size;
 
     /* the exact controller name is in the "model" subelement, e.g.:
      * <controller type='pci' model='pcie-root-port'>
diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
index bda7de7f64c6b76ca8f4e7528160969a4ebc25b2..8c68acb533bf1117e490c9d60dbf33dd4a79d3b9 100644
--- a/src/qemu/qemu_command.c
+++ b/src/qemu/qemu_command.c
@@ -6431,7 +6431,7 @@ qemuBuildGlobalControllerCommandLine(virCommand *cmd,
             }
 
             virCommandAddArg(cmd, "-global");
-            virCommandAddArgFormat(cmd, "%s.pci-hole64-size=%luK", hoststr,
+            virCommandAddArgFormat(cmd, "%s.pci-hole64-size=%lluK", hoststr,
                                    cont->opts.pciopts.pcihole64size);
         }
     }