1 files changed, 1 insertions, 1 deletions
diff --git a/src/backtrace.c b/src/backtrace.c
index e4f5a3064..991a67d00 100644
--- a/src/backtrace.c
+++ b/src/backtrace.c
@@ -16,7 +16,7 @@
 #include <mruby/data.h>
 
 struct backtrace_location {
-  int lineno;
+  int32_t lineno;
   mrb_sym method_id;
   const char *filename;
 };