diff --git a/include/exec/memory.h b/include/exec/memory.h
index c8b9088924..175d7151a5 100644
--- a/include/exec/memory.h
+++ b/include/exec/memory.h
@@ -2305,7 +2305,7 @@ static inline uint8_t address_space_ldub_cached(MemoryRegionCache *cache,
 }
 
 static inline void address_space_stb_cached(MemoryRegionCache *cache,
-    hwaddr addr, uint32_t val, MemTxAttrs attrs, MemTxResult *result)
+    hwaddr addr, uint8_t val, MemTxAttrs attrs, MemTxResult *result)
 {
     assert(addr < cache->len);
     if (likely(cache->ptr)) {