diff --git a/src/debug.c b/src/debug.c
index 8ecbd02..402fba5 100644
--- a/src/debug.c
+++ b/src/debug.c
@@ -34,6 +34,7 @@
 #include "little_endian.h"
 #include "xsystem4.h"
 
+bool dbg_enabled = true;
 static jmp_buf dbg_continuation;
 
 enum {
diff --git a/src/debugger_scm.c b/src/debugger_scm.c
index 72da3da..42f28be 100644
--- a/src/debugger_scm.c
+++ b/src/debugger_scm.c
@@ -31,8 +31,6 @@
 #include "debugger.h"
 #include "little_endian.h"
 
-bool dbg_enabled = true;
-
 struct variable {
 	enum ain_data_type data_type;
 	int struct_type;
diff --git a/src/util.c b/src/util.c
index d9e53a1..4c014d0 100644
--- a/src/util.c
+++ b/src/util.c
@@ -17,6 +17,7 @@
 #include <stdlib.h>
 #include <string.h>
 #include <time.h>
+#include <ctype.h>
 
 #include "system4.h"
 #include "system4/utfsjis.h"