diff --git a/README.md b/README.md
index b8c2789..e3f010b 100644
--- a/README.md
+++ b/README.md
@@ -184,7 +184,7 @@ This dictionary can be used to assign either user specifications or default over
         commands:
           - ALL
       - users:
-          - %wheel
+          - "%wheel"
         hosts:
           - ALL
         operators:
@@ -263,7 +263,7 @@ This dictionary can be used to assign either user specifications or default over
                 commands:
                   - ALL
               - users:
-                  - %wheel
+                  - "%wheel"
                 hosts:
                   - ALL
                 operators:
diff --git a/defaults/main.yml b/defaults/main.yml
index 93b8b7a..7a69fff 100644
--- a/defaults/main.yml
+++ b/defaults/main.yml
@@ -57,7 +57,7 @@ sudo_sudoers_files:
         commands:
           - ALL
       - users:
-          - %wheel
+          - "%wheel"
         hosts:
           - ALL
         operators:
diff --git a/examples/simple3.yml b/examples/simple3.yml
index daadcb5..51b4be0 100644
--- a/examples/simple3.yml
+++ b/examples/simple3.yml
@@ -56,7 +56,7 @@
         commands:
           - ALL
       - users:
-          - %wheel
+          - "%wheel"
         hosts:
           - ALL
         operators:
diff --git a/examples/simple4.yml b/examples/simple4.yml
index ac48bb4..f5693f1 100644
--- a/examples/simple4.yml
+++ b/examples/simple4.yml
@@ -64,7 +64,7 @@
                 commands:
                   - ALL
               - users:
-                  - %wheel
+                  - "%wheel"
                 hosts:
                   - ALL
                 operators: