diff --git a/src/libvterm/bin/vterm-ctrl.c b/src/libvterm/bin/vterm-ctrl.c
index 14e35cd..2568ee6 100644
--- a/src/libvterm/bin/vterm-ctrl.c
+++ b/src/libvterm/bin/vterm-ctrl.c
@@ -1,10 +1,11 @@
 #define _XOPEN_SOURCE 500  /* strdup */
 
-#include <stdbool.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #define streq(a,b) (strcmp(a,b)==0)
+#define TRUE 1
+#define FALSE 0
 
 #include <termios.h>
 
@@ -60,13 +61,14 @@
   NULL
 };
 
-static bool seticanon(bool icanon, bool echo)
+static int seticanon(int icanon, int echo)
 {
   struct termios termios;
+  int ret;
 
   tcgetattr(0, &termios);
 
-  bool ret = (termios.c_lflag & ICANON);
+  ret = (termios.c_lflag & ICANON);
 
   if(icanon) termios.c_lflag |=  ICANON;
   else       termios.c_lflag &= ~ICANON;
@@ -84,16 +86,16 @@
   int c;
 
   /* await CSI - 8bit or 2byte 7bit form */
-  bool in_esc = false;
+  int in_esc = FALSE;
   while((c = getchar())) {
     if(c == c1)
       break;
     if(in_esc && c == (char)(c1 - 0x40))
       break;
     if(!in_esc && c == 0x1b)
-      in_esc = true;
+      in_esc = TRUE;
     else
-      in_esc = false;
+      in_esc = FALSE;
   }
 }
 
@@ -121,7 +123,7 @@
 static char *read_dcs()
 {
   unsigned char dcs[32];
-  bool in_esc = false;
+  int in_esc = FALSE;
   int i;
 
   await_c1(0x90);
@@ -133,10 +135,10 @@
     if(in_esc && c == 0x5c)
       break;
     if(!in_esc && c == 0x1b)
-      in_esc = true;
+      in_esc = TRUE;
     else {
       dcs[i++] = c;
-      in_esc = false;
+      in_esc = FALSE;
     }
   }
   dcs[++i] = 0;
@@ -158,7 +160,7 @@
   exit(exitcode);
 }
 
-static bool query_dec_mode(int mode)
+static int query_dec_mode(int mode)
 {
   char *s = NULL;
 
@@ -189,12 +191,12 @@
     free(s);
 
     if(reply_value == 1 || reply_value == 3)
-      return true;
+      return TRUE;
     if(reply_value == 2 || reply_value == 4)
-      return false;
+      return FALSE;
 
     printf("Unrecognised reply to DECRQM: %d\n", reply_value);
-    return false;
+    return FALSE;
   } while(1);
 }
 
@@ -247,11 +249,11 @@
   } while(1);
 }
 
-bool wasicanon;
+int wasicanon;
 
 void restoreicanon(void)
 {
-  seticanon(wasicanon, true);
+  seticanon(wasicanon, TRUE);
 }
 
 int main(int argc, char *argv[])
@@ -261,7 +263,7 @@
   if(argc == 1)
     usage(0);
 
-  wasicanon = seticanon(false, false);
+  wasicanon = seticanon(FALSE, FALSE);
   atexit(restoreicanon);
 
   while(argi < argc) {