diff --git a/vyper/ir/compile_ir.py b/vyper/ir/compile_ir.py
index 472d28f4fb..4c68aa2c8f 100644
--- a/vyper/ir/compile_ir.py
+++ b/vyper/ir/compile_ir.py
@@ -580,7 +580,9 @@ def _height_of(witharg):
     # SHA3 a 64 byte value
     elif code.value == "sha3_64":
         o = _compile_to_assembly(code.args[0], withargs, existing_labels, break_dest, height)
-        o.extend(_compile_to_assembly(code.args[1], withargs, existing_labels, break_dest, height))
+        o.extend(
+            _compile_to_assembly(code.args[1], withargs, existing_labels, break_dest, height + 1)
+        )
         o.extend(
             [
                 *PUSH(MemoryPositions.FREE_VAR_SPACE2),