diff --git a/README.md b/README.md
index 8538d1e7..c2844e85 100644
--- a/README.md
+++ b/README.md
@@ -72,7 +72,8 @@ usage: openapi-diff <old> <new>
     --off                       No information printed
     --query <property=value>    use query param for authorisation
     --state                     Only output diff state: no_changes,
-                                incompatible, compatible
+                                metadata, compatible, unknown,
+                                incompatible
     --text <file>               export diff as text in given file
     --trace                     be extra verbose
     --version                   print the version information and exit
@@ -125,7 +126,8 @@ usage: openapi-diff <old> <new>
     --off                       No information printed
     --query <property=value>    use query param for authorisation
     --state                     Only output diff state: no_changes,
-                                incompatible, compatible
+                                metadata, compatible, unknown,
+                                incompatible
     --fail-on-incompatible      Fail only if API changes broke backward compatibility
     --fail-on-changed           Fail if API changed but is backward compatible
     --config-file               Config file to override default behavior. Supported file formats: .yaml
diff --git a/cli/src/main/java/org/openapitools/openapidiff/cli/Main.java b/cli/src/main/java/org/openapitools/openapidiff/cli/Main.java
index 85f125d7..79d94e6e 100644
--- a/cli/src/main/java/org/openapitools/openapidiff/cli/Main.java
+++ b/cli/src/main/java/org/openapitools/openapidiff/cli/Main.java
@@ -6,8 +6,10 @@
 import java.io.File;
 import java.io.FileOutputStream;
 import java.io.OutputStreamWriter;
+import java.util.Arrays;
 import java.util.Collections;
 import java.util.List;
+import java.util.stream.Collectors;
 import org.apache.commons.cli.CommandLine;
 import org.apache.commons.cli.CommandLineParser;
 import org.apache.commons.cli.DefaultParser;
@@ -19,6 +21,7 @@
 import org.openapitools.openapidiff.core.OpenApiCompare;
 import org.openapitools.openapidiff.core.compare.OpenApiDiffOptions;
 import org.openapitools.openapidiff.core.model.ChangedOpenApi;
+import org.openapitools.openapidiff.core.model.DiffResult;
 import org.openapitools.openapidiff.core.output.AsciidocRender;
 import org.openapitools.openapidiff.core.output.ConsoleRender;
 import org.openapitools.openapidiff.core.output.HtmlRender;
@@ -42,7 +45,11 @@ public static void main(String... args) {
     options.addOption(
         Option.builder()
             .longOpt("state")
-            .desc("Only output diff state: no_changes, incompatible, compatible")
+            .desc(
+                "Only output diff state: "
+                    + Arrays.stream(DiffResult.values())
+                        .map(DiffResult::getValue)
+                        .collect(Collectors.joining(", ")))
             .build());
     options.addOption(
         Option.builder()