diff --git a/man/loader.conf.xml b/man/loader.conf.xml
index 29315ceb17..4c0355800c 100644
--- a/man/loader.conf.xml
+++ b/man/loader.conf.xml
@@ -41,8 +41,8 @@
     a comment line. Empty and comment lines are ignored.</para>
 
     <para>Boolean arguments may be written as
-    <literal>yes</literal>/<literal>y</literal>/<literal>true</literal>/<literal>1</literal> or
-    <literal>no</literal>/<literal>n</literal>/<literal>false</literal>/<literal>0</literal>.
+    <literal>yes</literal>/<literal>y</literal>/<literal>true</literal>/<literal>t</literal>/<literal>on</literal>/<literal>1</literal> or
+    <literal>no</literal>/<literal>n</literal>/<literal>false</literal>/<literal>f</literal>/<literal>off</literal>/<literal>0</literal>.
     </para>
   </refsect1>
 
diff --git a/src/boot/efi/util.c b/src/boot/efi/util.c
index b2977546a8..0c28cab246 100644
--- a/src/boot/efi/util.c
+++ b/src/boot/efi/util.c
@@ -75,7 +75,9 @@ EFI_STATUS parse_boolean(const CHAR8 *v, BOOLEAN *b) {
         if (strcmpa(v, (CHAR8 *)"1") == 0 ||
             strcmpa(v, (CHAR8 *)"yes") == 0 ||
             strcmpa(v, (CHAR8 *)"y") == 0 ||
-            strcmpa(v, (CHAR8 *)"true") == 0) {
+            strcmpa(v, (CHAR8 *)"true") == 0 ||
+            strcmpa(v, (CHAR8 *)"t") == 0 ||
+            strcmpa(v, (CHAR8 *)"on") == 0) {
                 *b = TRUE;
                 return EFI_SUCCESS;
         }
@@ -83,7 +85,9 @@ EFI_STATUS parse_boolean(const CHAR8 *v, BOOLEAN *b) {
         if (strcmpa(v, (CHAR8 *)"0") == 0 ||
             strcmpa(v, (CHAR8 *)"no") == 0 ||
             strcmpa(v, (CHAR8 *)"n") == 0 ||
-            strcmpa(v, (CHAR8 *)"false") == 0) {
+            strcmpa(v, (CHAR8 *)"false") == 0 ||
+            strcmpa(v, (CHAR8 *)"f") == 0 ||
+            strcmpa(v, (CHAR8 *)"off") == 0) {
                 *b = FALSE;
                 return EFI_SUCCESS;
         }