diff --git a/src/hidden/_index.scss b/src/hidden/_index.scss
index 8cf4830..070be4c 100644
--- a/src/hidden/_index.scss
+++ b/src/hidden/_index.scss
@@ -5,7 +5,7 @@
 }
 
 @include Option("userChrome.hidden.navbar") {
-  @include OneLinerNabarContent() {
+  @include OneLinerNavbarContent() {
     #nav-bar {
       visibility: collapse; /* display: none is not work */
     }
diff --git a/src/utils/_one_liner.scss b/src/utils/_one_liner.scss
index 9275321..55dab40 100644
--- a/src/utils/_one_liner.scss
+++ b/src/utils/_one_liner.scss
@@ -46,7 +46,7 @@
   }
 }
 
-@mixin OneLinerNabarContent() {
+@mixin OneLinerNavbarContent() {
   @include NotOption("userChrome.tabbar.one_liner") {
     @content;
   }
@@ -61,7 +61,7 @@
 
 @mixin OneLinerNavbar() {
   @include Option("userChrome.autohide.navbar") {
-    @include OneLinerNabarContent() {
+    @include OneLinerNavbarContent() {
       @content;
     }
   }