diff --git a/esp32_ulp/assemble.py b/esp32_ulp/assemble.py
index 8b79071..b1e5876 100644
--- a/esp32_ulp/assemble.py
+++ b/esp32_ulp/assemble.py
@@ -246,7 +246,7 @@ def d_global(self, symbol):
         self.symbols.set_global(symbol)
 
     def append_data(self, wordlen, args):
-        data = [int(arg).to_bytes(wordlen, 'little') for arg in args]
+        data = [int(self.opcodes.eval_arg(arg)).to_bytes(wordlen, 'little') for arg in args]
         self.append_section(b''.join(data))
 
     def d_byte(self, *args):