diff --git a/src/libvterm/bin/unterm.c b/src/libvterm/bin/unterm.c
index acaf2d2..b8fe37c 100644
--- a/src/libvterm/bin/unterm.c
+++ b/src/libvterm/bin/unterm.c
@@ -265,7 +265,7 @@
   }
 
   vt = vterm_new(rows, cols);
-  vterm_set_utf8(vt, true);
+  vterm_set_utf8(vt, TRUE);
 
   vts = vterm_obtain_screen(vt);
   vterm_screen_set_callbacks(vts, &cb_screen, NULL);
diff --git a/src/libvterm/include/vterm.h b/src/libvterm/include/vterm.h
index 5bc47e5..ccd10c5 100644
--- a/src/libvterm/include/vterm.h
+++ b/src/libvterm/include/vterm.h
@@ -10,10 +10,12 @@
 
 #include <stdint.h>
 #include <stdlib.h>
-#include <stdbool.h>
 
 #include "vterm_keycodes.h"
 
+#define TRUE 1
+#define FALSE 0
+
 typedef struct VTerm VTerm;
 typedef struct VTermState VTermState;
 typedef struct VTermScreen VTermScreen;
@@ -183,7 +185,7 @@
 void vterm_keyboard_end_paste(VTerm *vt);
 
 void vterm_mouse_move(VTerm *vt, int row, int col, VTermModifier mod);
-void vterm_mouse_button(VTerm *vt, int button, bool pressed, VTermModifier mod);
+void vterm_mouse_button(VTerm *vt, int button, int pressed, VTermModifier mod);
 
 /* ------------
  * Parser layer
@@ -235,6 +237,8 @@
   int (*erase)(VTermRect rect, int selective, void *user);
   int (*initpen)(void *user);
   int (*setpenattr)(VTermAttr attr, VTermValue *val, void *user);
+  /* Callback for setting various properties.  Must return 1 if the property
+   * was accepted, 0 otherwise. */
   int (*settermprop)(VTermProp prop, VTermValue *val, void *user);
   int (*bell)(void *user);
   int (*resize)(int rows, int cols, VTermPos *delta, void *user);
diff --git a/src/libvterm/src/mouse.c b/src/libvterm/src/mouse.c
index 9962e4f..ba17aa4 100644
--- a/src/libvterm/src/mouse.c
+++ b/src/libvterm/src/mouse.c
@@ -70,7 +70,7 @@
   }
 }
 
-void vterm_mouse_button(VTerm *vt, int button, bool pressed, VTermModifier mod)
+void vterm_mouse_button(VTerm *vt, int button, int pressed, VTermModifier mod)
 {
   VTermState *state = vt->state;
 
diff --git a/src/libvterm/src/pen.c b/src/libvterm/src/pen.c
index d7ea9b1..81987f6 100644
--- a/src/libvterm/src/pen.c
+++ b/src/libvterm/src/pen.c
@@ -33,17 +33,17 @@
   0x85, 0x90, 0x9B, 0xA6, 0xB1, 0xBC, 0xC7, 0xD2, 0xDD, 0xE8, 0xF3, 0xFF,
 };
 
-static bool lookup_colour_ansi(const VTermState *state, long index, VTermColor *col)
+static int lookup_colour_ansi(const VTermState *state, long index, VTermColor *col)
 {
   if(index >= 0 && index < 16) {
     *col = state->colors[index];
-    return true;
+    return TRUE;
   }
 
-  return false;
+  return FALSE;
 }
 
-static bool lookup_colour_palette(const VTermState *state, long index, VTermColor *col)
+static int lookup_colour_palette(const VTermState *state, long index, VTermColor *col)
 {
   if(index >= 0 && index < 16) {
     /* Normal 8 colours or high intensity - parse as palette 0 */
@@ -57,7 +57,7 @@
     col->green = ramp6[index/6   % 6];
     col->red   = ramp6[index/6/6 % 6];
 
-    return true;
+    return TRUE;
   }
   else if(index >= 232 && index < 256) {
     /* 24 greyscales */
@@ -67,10 +67,10 @@
     col->green = ramp24[index];
     col->red   = ramp24[index];
 
-    return true;
+    return TRUE;
   }
 
-  return false;
+  return FALSE;
 }
 
 static int lookup_colour(const VTermState *state, int palette, const long args[], int argcount, VTermColor *col, int *index)
diff --git a/src/libvterm/t/harness.c b/src/libvterm/t/harness.c
index 2b22464..2ba77f0 100644
--- a/src/libvterm/t/harness.c
+++ b/src/libvterm/t/harness.c
@@ -351,7 +351,7 @@
       rect.start_row, rect.end_row, rect.start_col, rect.end_col);
 
   if(want_screen_damage_cells) {
-    bool equals = false;
+    int equals = FALSE;
     int row;
     int col;
 
@@ -373,7 +373,7 @@
         break;
 
       if(!equals)
-        printf(" ="), equals = true;
+        printf(" ="), equals = TRUE;
 
       printf(" %d<", row);
       for(col = rect.start_col; col < eol; col++) {
diff --git a/src/version.c b/src/version.c
index 10189f4..1553a90 100644
--- a/src/version.c
+++ b/src/version.c
@@ -770,6 +770,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    772,
+/**/
     771,
 /**/
     770,