diff --git a/loopy/target/c/c_execution.py b/loopy/target/c/c_execution.py
index 1a69d8da2bcf09b4920cd1927f526253dd46818d..e89bb9181f1cb02952c5da504f0a10a9240416e8 100644
--- a/loopy/target/c/c_execution.py
+++ b/loopy/target/c/c_execution.py
@@ -280,13 +280,6 @@ class IDIToCDLL(object):
 
         return arg_info
 
-    def _append_arg(self, name, dtype, pointer=False):
-        """Append arg info to current argument list."""
-        self._arg_info.append((
-            name,
-            self._dtype_to_ctype(dtype, pointer=pointer)
-        ))
-
     def _dtype_to_ctype(self, dtype, pointer=False):
         """Map NumPy dtype to equivalent ctypes type."""
         typename = self.registry.dtype_to_ctype(dtype)