diff --git a/smol_gkos.ino b/smol_gkos.ino
index ddab07e..2de8d00 100644
--- a/smol_gkos.ino
+++ b/smol_gkos.ino
@@ -6,6 +6,7 @@
 // using my own masks here since the inbuilt ones conflict with arrow keys etc.
 #define MASK_SHIFT  0x100
 #define MASK_ALTGR  0x200
+#define MASK_CTRL   0x400
 
 const byte PIN_A = 33;
 const byte PIN_B = 32;
@@ -63,8 +64,8 @@ const byte chord_buttons[24] = {
 // keypresses for chords in sets of 4
 // index 0 is the chord on its own, 1-3 correspond to chord_buttons
 const int chord_targets[32] = {
-    KEY_BACKSPACE, KEY_LEFT, KEY_LEFT, KEY_HOME,
-    KEY_SPACE, KEY_RIGHT, KEY_RIGHT, KEY_END,
+    KEY_BACKSPACE, KEY_LEFT + MASK_CTRL, KEY_LEFT, KEY_HOME,
+    KEY_SPACE, KEY_RIGHT + MASK_CTRL, KEY_RIGHT, KEY_END,
     KEY_G, KEY_H, KEY_I, KEY_J,
     KEY_K, KEY_L, KEY_M, KEY_N,
     KEY_O, KEY_P, KEY_Q, KEY_R,
@@ -73,8 +74,8 @@ const int chord_targets[32] = {
     0, 0, 0, 0
 };
 const int chord_targets_symbol[32] = {
-    KEY_BACKSPACE, KEY_LEFT, KEY_LEFT, KEY_HOME,
-    KEY_SPACE, KEY_RIGHT, KEY_RIGHT, KEY_END,
+    0, 0, 0, 0,
+    0, 0, 0, 0,
     KEY_0, KEY_7, KEY_8, KEY_9,
 //  #              @                       ½                   &
     KEY_BACKSLASH, KEY_QUOTE + MASK_SHIFT, KEY_5 + MASK_ALTGR, KEY_7 + MASK_SHIFT,
@@ -383,7 +384,8 @@ void key_released(byte key) {
                 key_pressed_total == chords[chord]) {
             target = chord_targets[chord * 4];
             if (mod_symbol || mod_symbol_lock)
-                target = chord_targets_symbol[chord * 4];
+                if (chord_targets_symbol[chord * 4] != 0)
+                    target = chord_targets_symbol[chord * 4];
 
             press_key(target);
             return;
@@ -393,7 +395,8 @@ void key_released(byte key) {
             if (key == chord_buttons[chord * 3 + b]) {
                 target = chord_targets[chord * 4 + 1 + b];
                 if (mod_symbol || mod_symbol_lock)
-                    target = chord_targets_symbol[chord * 4 + 1 + b];
+                    if (chord_targets_symbol[chord * 4 + 1 + b] != 0)
+                        target = chord_targets_symbol[chord * 4 + 1 + b];
 
                 // erase key from total so you can hold the chord down for
                 // multiple chorded keypresses
@@ -427,6 +430,10 @@ void press_key(int key) {
         mod_altgr = true;
         key &= ~(MASK_ALTGR);
     }
+    if (key & MASK_CTRL) {
+        mod_control = true;
+        key &= ~(MASK_CTRL);
+    }
 
     // modifiers
     if (mod_shift || mod_shift_lock)