diff --git a/exec.c b/exec.c
index f2bed92b64a1a5909d055935fc00c95093f9df51..b05c5d2d74915054599517db8df4502c26dc2ecf 100644
--- a/exec.c
+++ b/exec.c
@@ -2630,7 +2630,7 @@ static MemTxResult address_space_write_continue(AddressSpace *as, hwaddr addr,
                 break;
             case 4:
                 /* 32 bit write access */
-                val = ldl_p(buf);
+                val = (uint32_t)ldl_p(buf);
                 result |= memory_region_dispatch_write(mr, addr1, val, 4,
                                                        attrs);
                 break;