1 files changed, 1 insertions, 1 deletions
diff --git a/debug.h b/debug.h
index 6a657eb38f..5c4b19a78b 100644
--- a/debug.h
+++ b/debug.h
@@ -25,7 +25,7 @@
 VALUE ruby_debug_print_value(int level, int debug_level, const char *header, VALUE v);
 ID    ruby_debug_print_id(int level, int debug_level, const char *header, ID id);
 NODE *ruby_debug_print_node(int level, int debug_level, const char *header, const NODE *node);
-void  ruby_debug_print_indent(int level, int debug_level, int indent_level);
+int   ruby_debug_print_indent(int level, int debug_level, int indent_level);
 void  ruby_debug_breakpoint(void);
 void  ruby_debug_gc_check_func(void);