diff --git a/librw/container.py b/librw/container.py
index 1683b2ce..f7c568d0 100644
--- a/librw/container.py
+++ b/librw/container.py
@@ -188,7 +188,7 @@ def __str__(self):
                 continue
 
             if instruction.address in self.bbstarts:
-                results.append(".L%x:" % (instruction.address))
+                results.append(".L%d:" % (instruction.address))
                 results.append(".LC%x:" % (instruction.address))
             else:
                 results.append(".LC%x:" % (instruction.address))
diff --git a/librw/rw.py b/librw/rw.py
index 4404c8f9..f16a52e4 100644
--- a/librw/rw.py
+++ b/librw/rw.py
@@ -187,7 +187,7 @@ def symbolize_cf_transfer(self, container, context=None):
                     # Check if the target is in .text section.
                     if container.is_in_section(".text", target):
                         function.bbstarts.add(target)
-                        instruction.op_str = ".L%x" % (target)
+                        instruction.op_str = ".L%d" % (target)
                     elif target in container.plt:
                         instruction.op_str = "{}@PLT".format(
                             container.plt[target])