diff --git a/hw/i386/pc.c b/hw/i386/pc.c
index d234cae..0cb8afd 100644
--- a/hw/i386/pc.c
+++ b/hw/i386/pc.c
@@ -1631,8 +1631,7 @@
         goto out;
     }
 
-    pc_dimm_memory_plug(dev, &pcms->hotplug_memory, mr, align, false,
-                        &local_err);
+    pc_dimm_memory_plug(dev, &pcms->hotplug_memory, mr, align, &local_err);
     if (local_err) {
         goto out;
     }
diff --git a/hw/mem/pc-dimm.c b/hw/mem/pc-dimm.c
index 2bae994..80f424b 100644
--- a/hw/mem/pc-dimm.c
+++ b/hw/mem/pc-dimm.c
@@ -33,8 +33,7 @@
 } pc_dimms_capacity;
 
 void pc_dimm_memory_plug(DeviceState *dev, MemoryHotplugState *hpms,
-                         MemoryRegion *mr, uint64_t align, bool gap,
-                         Error **errp)
+                         MemoryRegion *mr, uint64_t align, Error **errp)
 {
     int slot;
     MachineState *machine = MACHINE(qdev_get_machine());
@@ -50,7 +49,7 @@
 
     addr = pc_dimm_get_free_addr(hpms->base,
                                  memory_region_size(&hpms->mr),
-                                 !addr ? NULL : &addr, align, gap,
+                                 !addr ? NULL : &addr, align,
                                  memory_region_size(mr), &local_err);
     if (local_err) {
         goto out;
@@ -295,8 +294,8 @@
 
 uint64_t pc_dimm_get_free_addr(uint64_t address_space_start,
                                uint64_t address_space_size,
-                               uint64_t *hint, uint64_t align, bool gap,
-                               uint64_t size, Error **errp)
+                               uint64_t *hint, uint64_t align, uint64_t size,
+                               Error **errp)
 {
     GSList *list = NULL, *item;
     uint64_t new_addr, ret = 0;
@@ -341,15 +340,13 @@
             goto out;
         }
 
-        if (ranges_overlap(dimm->addr, dimm_size, new_addr,
-                           size + (gap ? 1 : 0))) {
+        if (ranges_overlap(dimm->addr, dimm_size, new_addr, size)) {
             if (hint) {
                 DeviceState *d = DEVICE(dimm);
                 error_setg(errp, "address range conflicts with '%s'", d->id);
                 goto out;
             }
-            new_addr = QEMU_ALIGN_UP(dimm->addr + dimm_size + (gap ? 1 : 0),
-                                     align);
+            new_addr = QEMU_ALIGN_UP(dimm->addr + dimm_size, align);
         }
     }
     ret = new_addr;
diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
index e1202ce..288b57e 100644
--- a/hw/ppc/spapr.c
+++ b/hw/ppc/spapr.c
@@ -2157,7 +2157,7 @@
         goto out;
     }
 
-    pc_dimm_memory_plug(dev, &ms->hotplug_memory, mr, align, false, &local_err);
+    pc_dimm_memory_plug(dev, &ms->hotplug_memory, mr, align, &local_err);
     if (local_err) {
         goto out;
     }
diff --git a/include/hw/mem/pc-dimm.h b/include/hw/mem/pc-dimm.h
index c1ee7b0..d83bf30 100644
--- a/include/hw/mem/pc-dimm.h
+++ b/include/hw/mem/pc-dimm.h
@@ -83,16 +83,15 @@
 
 uint64_t pc_dimm_get_free_addr(uint64_t address_space_start,
                                uint64_t address_space_size,
-                               uint64_t *hint, uint64_t align, bool gap,
-                               uint64_t size, Error **errp);
+                               uint64_t *hint, uint64_t align, uint64_t size,
+                               Error **errp);
 
 int pc_dimm_get_free_slot(const int *hint, int max_slots, Error **errp);
 
 int qmp_pc_dimm_device_list(Object *obj, void *opaque);
 uint64_t pc_existing_dimms_capacity(Error **errp);
 void pc_dimm_memory_plug(DeviceState *dev, MemoryHotplugState *hpms,
-                         MemoryRegion *mr, uint64_t align, bool gap,
-                         Error **errp);
+                         MemoryRegion *mr, uint64_t align, Error **errp);
 void pc_dimm_memory_unplug(DeviceState *dev, MemoryHotplugState *hpms,
                            MemoryRegion *mr);
 #endif