diff --git a/exec.c b/exec.c
index fa5f9c3171d2c631af7dbdc3cf7295d96cf97992..1355661963f657f9c5d392214314cfa0d557f880 100644
--- a/exec.c
+++ b/exec.c
@@ -2390,33 +2390,6 @@ void stl_phys_notdirty(hwaddr addr, uint32_t val)
     }
 }
 
-void stq_phys_notdirty(hwaddr addr, uint64_t val)
-{
-    uint8_t *ptr;
-    MemoryRegionSection *section;
-
-    section = phys_page_find(address_space_memory.dispatch, addr >> TARGET_PAGE_BITS);
-
-    if (!memory_region_is_ram(section->mr) || section->readonly) {
-        addr = memory_region_section_addr(section, addr);
-        if (memory_region_is_ram(section->mr)) {
-            section = &phys_sections[phys_section_rom];
-        }
-#ifdef TARGET_WORDS_BIGENDIAN
-        io_mem_write(section->mr, addr, val >> 32, 4);
-        io_mem_write(section->mr, addr + 4, (uint32_t)val, 4);
-#else
-        io_mem_write(section->mr, addr, (uint32_t)val, 4);
-        io_mem_write(section->mr, addr + 4, val >> 32, 4);
-#endif
-    } else {
-        ptr = qemu_get_ram_ptr((memory_region_get_ram_addr(section->mr)
-                                & TARGET_PAGE_MASK)
-                               + memory_region_section_addr(section, addr));
-        stq_p(ptr, val);
-    }
-}
-
 /* warning: addr must be aligned */
 static inline void stl_phys_internal(hwaddr addr, uint32_t val,
                                      enum device_endian endian)
diff --git a/include/exec/cpu-common.h b/include/exec/cpu-common.h
index af851aa633d1087f531ddb8d1bb8d6c9b61c4361..af5258d4142870744bd3ded85399bdf8c71c6b90 100644
--- a/include/exec/cpu-common.h
+++ b/include/exec/cpu-common.h
@@ -102,7 +102,6 @@ uint32_t lduw_phys(hwaddr addr);
 uint32_t ldl_phys(hwaddr addr);
 uint64_t ldq_phys(hwaddr addr);
 void stl_phys_notdirty(hwaddr addr, uint32_t val);
-void stq_phys_notdirty(hwaddr addr, uint64_t val);
 void stw_phys(hwaddr addr, uint32_t val);
 void stl_phys(hwaddr addr, uint32_t val);
 void stq_phys(hwaddr addr, uint64_t val);
diff --git a/include/exec/poison.h b/include/exec/poison.h
index 7d7b23b1fc82e2c08fa8fc6ebb0836fc2a257207..2341a750413f50a5ecd9785c629de2f5fcacbda8 100644
--- a/include/exec/poison.h
+++ b/include/exec/poison.h
@@ -42,7 +42,6 @@
 #pragma GCC poison ldl_phys
 #pragma GCC poison ldq_phys
 #pragma GCC poison stl_phys_notdirty
-#pragma GCC poison stq_phys_notdirty
 #pragma GCC poison stw_phys
 #pragma GCC poison stl_phys
 #pragma GCC poison stq_phys