diff --git a/src/qemu/qemu_monitor.c b/src/qemu/qemu_monitor.c
index b6d2936872..7959933e7c 100644
--- a/src/qemu/qemu_monitor.c
+++ b/src/qemu/qemu_monitor.c
@@ -2348,10 +2348,10 @@ qemuMonitorChangeMedia(qemuMonitorPtr mon,
 int
 qemuMonitorSaveVirtualMemory(qemuMonitorPtr mon,
                              unsigned long long offset,
-                             size_t length,
+                             unsigned long long length,
                              const char *path)
 {
-    VIR_DEBUG("offset=%llu length=%zu path=%s", offset, length, path);
+    VIR_DEBUG("offset=%llu length=%llu path=%s", offset, length, path);
 
     QEMU_CHECK_MONITOR(mon);
 
@@ -2362,10 +2362,10 @@ qemuMonitorSaveVirtualMemory(qemuMonitorPtr mon,
 int
 qemuMonitorSavePhysicalMemory(qemuMonitorPtr mon,
                               unsigned long long offset,
-                              size_t length,
+                              unsigned long long length,
                               const char *path)
 {
-    VIR_DEBUG("offset=%llu length=%zu path=%s", offset, length, path);
+    VIR_DEBUG("offset=%llu length=%llu path=%s", offset, length, path);
 
     QEMU_CHECK_MONITOR(mon);
 
diff --git a/src/qemu/qemu_monitor.h b/src/qemu/qemu_monitor.h
index 8fc11c955e..95de891150 100644
--- a/src/qemu/qemu_monitor.h
+++ b/src/qemu/qemu_monitor.h
@@ -726,11 +726,11 @@ int qemuMonitorChangeMedia(qemuMonitorPtr mon,
 
 int qemuMonitorSaveVirtualMemory(qemuMonitorPtr mon,
                                  unsigned long long offset,
-                                 size_t length,
+                                 unsigned long long length,
                                  const char *path);
 int qemuMonitorSavePhysicalMemory(qemuMonitorPtr mon,
                                   unsigned long long offset,
-                                  size_t length,
+                                  unsigned long long length,
                                   const char *path);
 
 int qemuMonitorSetMigrationSpeed(qemuMonitorPtr mon,
diff --git a/src/qemu/qemu_monitor_json.c b/src/qemu/qemu_monitor_json.c
index cdfaf9785a..d99d291d89 100644
--- a/src/qemu/qemu_monitor_json.c
+++ b/src/qemu/qemu_monitor_json.c
@@ -3100,7 +3100,7 @@ int qemuMonitorJSONChangeMedia(qemuMonitorPtr mon,
 static int qemuMonitorJSONSaveMemory(qemuMonitorPtr mon,
                                      const char *cmdtype,
                                      unsigned long long offset,
-                                     size_t length,
+                                     unsigned long long length,
                                      const char *path)
 {
     int ret = -1;
@@ -3129,7 +3129,7 @@ static int qemuMonitorJSONSaveMemory(qemuMonitorPtr mon,
 
 int qemuMonitorJSONSaveVirtualMemory(qemuMonitorPtr mon,
                                      unsigned long long offset,
-                                     size_t length,
+                                     unsigned long long length,
                                      const char *path)
 {
     return qemuMonitorJSONSaveMemory(mon, "memsave", offset, length, path);
@@ -3137,7 +3137,7 @@ int qemuMonitorJSONSaveVirtualMemory(qemuMonitorPtr mon,
 
 int qemuMonitorJSONSavePhysicalMemory(qemuMonitorPtr mon,
                                       unsigned long long offset,
-                                      size_t length,
+                                      unsigned long long length,
                                       const char *path)
 {
     return qemuMonitorJSONSaveMemory(mon, "pmemsave", offset, length, path);
diff --git a/src/qemu/qemu_monitor_json.h b/src/qemu/qemu_monitor_json.h
index a608410703..63f569716d 100644
--- a/src/qemu/qemu_monitor_json.h
+++ b/src/qemu/qemu_monitor_json.h
@@ -118,11 +118,11 @@ int qemuMonitorJSONChangeMedia(qemuMonitorPtr mon,
 
 int qemuMonitorJSONSaveVirtualMemory(qemuMonitorPtr mon,
                                      unsigned long long offset,
-                                     size_t length,
+                                     unsigned long long length,
                                      const char *path);
 int qemuMonitorJSONSavePhysicalMemory(qemuMonitorPtr mon,
                                       unsigned long long offset,
-                                      size_t length,
+                                      unsigned long long length,
                                       const char *path);
 
 int qemuMonitorJSONSetMigrationSpeed(qemuMonitorPtr mon,