diff --git a/devtools/cli/src/main/java/io/quarkus/cli/create/TargetGAVGroup.java b/devtools/cli/src/main/java/io/quarkus/cli/create/TargetGAVGroup.java
index 04d083d811f8d..bb1a8f85cad4e 100644
--- a/devtools/cli/src/main/java/io/quarkus/cli/create/TargetGAVGroup.java
+++ b/devtools/cli/src/main/java/io/quarkus/cli/create/TargetGAVGroup.java
@@ -7,7 +7,7 @@
 import picocli.CommandLine.TypeConversionException;
 
 public class TargetGAVGroup {
-    static final String BAD_IDENTIFIER = "The specified %s identifier (%s) contains invalid characters. Valid characters are alphanumeric (A-Za-z), underscore, dash and dot.";
+    static final String BAD_IDENTIFIER = "The specified %s identifier (%s) contains invalid characters. Valid characters are alphanumeric characters (A-Za-z0-9), underscores, dashes and dots.";
     static final Pattern OK_ID = Pattern.compile("[0-9A-Za-z_.-]+");
 
     static final String DEFAULT_GAV = CreateProjectHelper.DEFAULT_GROUP_ID + ":"
diff --git a/devtools/maven/src/main/java/io/quarkus/maven/CreateProjectMojo.java b/devtools/maven/src/main/java/io/quarkus/maven/CreateProjectMojo.java
index c559521ba1364..55baff707f8c6 100644
--- a/devtools/maven/src/main/java/io/quarkus/maven/CreateProjectMojo.java
+++ b/devtools/maven/src/main/java/io/quarkus/maven/CreateProjectMojo.java
@@ -57,7 +57,7 @@
  */
 @Mojo(name = "create", requiresProject = false)
 public class CreateProjectMojo extends AbstractMojo {
-    static final String BAD_IDENTIFIER = "The specified %s identifier (%s) contains invalid characters. Valid characters are alphanumeric (A-Za-z), underscore, dash and dot.";
+    static final String BAD_IDENTIFIER = "The specified %s identifier (%s) contains invalid characters. Valid characters are alphanumeric characters (A-Za-z0-9), underscores, dashes and dots.";
     static final Pattern OK_ID = Pattern.compile("[0-9A-Za-z_.-]+");
 
     private static final String DEFAULT_GROUP_ID = "org.acme";