diff --git a/uc.c b/uc.c
index 65161dbc..7991fdd7 100644
--- a/uc.c
+++ b/uc.c
@@ -469,6 +469,10 @@ uc_err uc_mem_read(uc_engine *uc, uint64_t address, void *_bytes, size_t size)
     size_t count = 0, len;
     uint8_t *bytes = _bytes;
 
+    // qemu cpu_physical_memory_rw() size is an int
+    if (size > INT_MAX)
+        return UC_ERR_ARG;
+
     if (uc->mem_redirect) {
         address = uc->mem_redirect(address);
     }
@@ -506,6 +510,10 @@ uc_err uc_mem_write(uc_engine *uc, uint64_t address, const void *_bytes, size_t
     size_t count = 0, len;
     const uint8_t *bytes = _bytes;
 
+    // qemu cpu_physical_memory_rw() size is an int
+    if (size > INT_MAX)
+        return UC_ERR_ARG;
+
     if (uc->mem_redirect) {
         address = uc->mem_redirect(address);
     }