diff --git a/hw/mem/pc-dimm.c b/hw/mem/pc-dimm.c
index 9e0c83e4153f5b2ee5bd87d8f3bebfc24f5a4e17..7387963cf1195a04d900ea826a7881c9d175d01b 100644
--- a/hw/mem/pc-dimm.c
+++ b/hw/mem/pc-dimm.c
@@ -27,6 +27,8 @@
 #include "sysemu/numa.h"
 #include "trace.h"
 
+static int pc_dimm_get_free_slot(const int *hint, int max_slots, Error **errp);
+
 void pc_dimm_plug(DeviceState *dev, MachineState *machine, uint64_t align,
                   Error **errp)
 {
@@ -111,7 +113,7 @@ static int pc_dimm_slot2bitmap(Object *obj, void *opaque)
     return 0;
 }
 
-int pc_dimm_get_free_slot(const int *hint, int max_slots, Error **errp)
+static int pc_dimm_get_free_slot(const int *hint, int max_slots, Error **errp)
 {
     unsigned long *bitmap;
     int slot = 0;
diff --git a/include/hw/mem/pc-dimm.h b/include/hw/mem/pc-dimm.h
index 860343d64f627e2943dc908b37e2c71f5fe31162..cf712476301f9825043e99770dfa40d17dea0b03 100644
--- a/include/hw/mem/pc-dimm.h
+++ b/include/hw/mem/pc-dimm.h
@@ -76,8 +76,6 @@ typedef struct PCDIMMDeviceClass {
     MemoryRegion *(*get_vmstate_memory_region)(PCDIMMDevice *dimm);
 } PCDIMMDeviceClass;
 
-int pc_dimm_get_free_slot(const int *hint, int max_slots, Error **errp);
-
 void pc_dimm_plug(DeviceState *dev, MachineState *machine, uint64_t align,
                   Error **errp);
 void pc_dimm_unplug(DeviceState *dev, MachineState *machine);