diff --git a/shared/src/components/keymap/header/keymap-header.component.ts b/shared/src/components/keymap/header/keymap-header.component.ts
index 008be348..a6983bb1 100644
--- a/shared/src/components/keymap/header/keymap-header.component.ts
+++ b/shared/src/components/keymap/header/keymap-header.component.ts
@@ -72,7 +72,9 @@ export class KeymapHeaderComponent implements OnChanges {
     }
 
     editKeymapAbbr(newAbbr: string) {
-        if (newAbbr.length !== 3) {
+        const regexp = new RegExp(/^[a-zA-Z\d]+$/g);
+
+        if (newAbbr.length < 1 || newAbbr.length > 3 || !regexp.test(newAbbr)) {
             this.renderer.setElementProperty(this.keymapAbbr.nativeElement, 'value', this.keymap.abbreviation);
             return;
         }
diff --git a/shared/src/store/reducers/user-configuration.ts b/shared/src/store/reducers/user-configuration.ts
index 28ce6d18..0b752cfe 100644
--- a/shared/src/store/reducers/user-configuration.ts
+++ b/shared/src/store/reducers/user-configuration.ts
@@ -274,7 +274,7 @@ export function getMacro(id: number) {
 }
 
 function generateAbbr(keymaps: Keymap[], abbr: string): string {
-    const chars: string[] = '23456789ABCDEFGHIJKLMNOPQRSTUVWXYZ'.split('');
+    const chars: string[] = '123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ'.split('');
     let position = 0;
 
     while (keymaps.some((keymap: Keymap) => keymap.abbreviation === abbr)) {