diff --git a/gdb/python/lib/gdb/dap/breakpoint.py b/gdb/python/lib/gdb/dap/breakpoint.py
index 8518814a8d2..ae3a5027f35 100644
--- a/gdb/python/lib/gdb/dap/breakpoint.py
+++ b/gdb/python/lib/gdb/dap/breakpoint.py
@@ -119,7 +119,7 @@ def _breakpoint_descriptor(bp):
             )
 
         if loc.address:
-            result["instructionReference"] = hex(loc.address),
+            result["instructionReference"] = hex(loc.address)
 
     return result