diff --git a/extlib/benz/error.c b/extlib/benz/error.c
index 56a0c39b..51d15a2f 100644
--- a/extlib/benz/error.c
+++ b/extlib/benz/error.c
@@ -19,6 +19,8 @@ pic_panic(pic_state *pic, const char *msg)
 #endif
 
   PIC_ABORT(pic);
+
+  PIC_UNREACHABLE();
 }
 
 void
diff --git a/extlib/benz/include/picrin.h b/extlib/benz/include/picrin.h
index c422833e..cd1bf61d 100644
--- a/extlib/benz/include/picrin.h
+++ b/extlib/benz/include/picrin.h
@@ -175,7 +175,7 @@ enum {
   PIC_TYPE_CXT     = 30,
   PIC_TYPE_CP      = 31,
   PIC_TYPE_FUNC    = 32,
-  PIC_TYPE_IREP    = 33,
+  PIC_TYPE_IREP    = 33
 };
 
 #define pic_invalid_p(pic,v) (pic_type(pic,v) == PIC_TYPE_INVALID)
diff --git a/extlib/benz/include/picrin/setup.h b/extlib/benz/include/picrin/setup.h
index c04b7f42..49706ba7 100644
--- a/extlib/benz/include/picrin/setup.h
+++ b/extlib/benz/include/picrin/setup.h
@@ -40,6 +40,7 @@
 #endif
 
 #ifndef PIC_ABORT
+void abort(void);
 # define PIC_ABORT(pic) abort()
 #endif