diff --git a/angr/call_stack.py b/angr/call_stack.py
index <HASH>..<HASH> 100644
--- a/angr/call_stack.py
+++ b/angr/call_stack.py
@@ -46,7 +46,7 @@ class CallFrame(object):
             # Try to convert the ret_addr to an integer
             try:
                 if self.ret_addr.symbolic:
-                    l.warning('CallStack does not support symbolic return addresses for performance concerns.')
+                    l.debug('CallStack does not support symbolic return addresses for performance concerns.')
                     self.ret_addr = None
                 else:
                     self.ret_addr = state.se.any_int(self.ret_addr)
CallStack: change the warning to debug to avoid excessive warning messages when running CFGFast on MIPS<I> binaries.