diff --git a/i386-asm.c b/i386-asm.c
index 1d1ebcf..16b2e91 100644
--- a/i386-asm.c
+++ b/i386-asm.c
@@ -1493,7 +1493,8 @@ ST_FUNC void subst_asm_operand(CString *add_str,
         else if ((sv->type.t & VT_BTYPE) == VT_SHORT)
             size = 2;
 #ifdef TCC_TARGET_X86_64
-        else if ((sv->type.t & VT_BTYPE) == VT_LLONG)
+        else if ((sv->type.t & VT_BTYPE) == VT_LLONG ||
+		 (sv->type.t & VT_BTYPE) == VT_PTR)
             size = 8;
 #endif
         else
diff --git a/tests/tcctest.c b/tests/tcctest.c
index 496de3a..22d9e88 100644
--- a/tests/tcctest.c
+++ b/tests/tcctest.c
@@ -2914,6 +2914,11 @@ void fancy_copy (unsigned *in, unsigned *out)
   asm volatile ("" : "=r" (*out) : "0" (*in));
 }
 
+void fancy_copy2 (unsigned *in, unsigned *out)
+{
+  asm volatile ("mov %0,(%1)" : : "r" (*in), "r" (out) : "memory");
+}
+
 void asm_test(void)
 {
     char buf[128];
@@ -2987,6 +2992,9 @@ void asm_test(void)
     val = 43;
     fancy_copy (&val, &val2);
     printf ("fancycpy(%d)=%d\n", val, val2);
+    val = 44;
+    fancy_copy2 (&val, &val2);
+    printf ("fancycpy2(%d)=%d\n", val, val2);
     return;
  label1:
     goto label2;