diff --git a/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/CrystalClientCodegen.java b/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/CrystalClientCodegen.java
index 2e77181d7a3..21b18e18154 100644
--- a/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/CrystalClientCodegen.java
+++ b/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/CrystalClientCodegen.java
@@ -657,7 +657,11 @@ public class CrystalClientCodegen extends DefaultCodegen {
         if (codegenProperty.isArray) { // array
             return "[" + constructExampleCode(codegenProperty.items, modelMaps, processedModelMap) + "]";
         } else if (codegenProperty.isMap) {
-            return "{ key: " + constructExampleCode(codegenProperty.items, modelMaps, processedModelMap) + "}";
+            if (codegenProperty.items != null) {
+                return "{ key: " + constructExampleCode(codegenProperty.items, modelMaps, processedModelMap) + "}";
+            } else {
+                return "{ ... }";
+            }
         } else if (codegenProperty.isPrimitiveType) { // primitive type
             if (codegenProperty.isEnum) {
                 // When inline enum, set example to first allowable value
diff --git a/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/GoClientCodegen.java b/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/GoClientCodegen.java
index 5f556a45671..3902e0b07cc 100644
--- a/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/GoClientCodegen.java
+++ b/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/GoClientCodegen.java
@@ -555,6 +555,9 @@ public class GoClientCodegen extends AbstractGoCodegen {
             if (modelMaps.containsKey(dataType)) {
                 prefix = "map[string][]" + goImportAlias + "." + dataType;
             }
+            if (codegenProperty.items == null) {
+                return prefix + "{ ... }";
+            }
             return prefix + "{\"key\": " + constructExampleCode(codegenProperty.items, modelMaps, processedModelMap) + "}";
         } else if (codegenProperty.isPrimitiveType) { // primitive type
             if (codegenProperty.isString) {
diff --git a/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/PowerShellClientCodegen.java b/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/PowerShellClientCodegen.java
index f55734fafa2..c7d4028d84a 100644
--- a/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/PowerShellClientCodegen.java
+++ b/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/PowerShellClientCodegen.java
@@ -1230,7 +1230,11 @@ public class PowerShellClientCodegen extends DefaultCodegen implements CodegenCo
             example.append(constructExampleCode(codegenProperty.items, modelMaps, processedModelMap, requiredOnly));
         } else if (codegenProperty.isMap) {
             example.append("@{ key_example = ");
-            example.append(constructExampleCode(codegenProperty.items, modelMaps, processedModelMap, requiredOnly));
+            if (codegenProperty.items != null) {
+                example.append(constructExampleCode(codegenProperty.items, modelMaps, processedModelMap, requiredOnly));
+            } else {
+                example.append(" ... ");
+            }
             example.append(" }");
         } else if (codegenProperty.isEnum || (codegenProperty.allowableValues != null && !codegenProperty.allowableValues.isEmpty())) {
             example.append(constructEnumExample(codegenProperty.allowableValues));
diff --git a/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/RubyClientCodegen.java b/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/RubyClientCodegen.java
index 335a329ef59..88a8aa6547d 100644
--- a/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/RubyClientCodegen.java
+++ b/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/RubyClientCodegen.java
@@ -680,7 +680,11 @@ public class RubyClientCodegen extends AbstractRubyCodegen {
             }
             return "[" + constructExampleCode(codegenProperty.items, modelMaps, processedModelMap) + "]";
         } else if (codegenProperty.isMap) {
-            return "{ key: " + constructExampleCode(codegenProperty.items, modelMaps, processedModelMap) + "}";
+            if (codegenProperty.items != null) {
+                return "{ key: " + constructExampleCode(codegenProperty.items, modelMaps, processedModelMap) + "}";
+            } else {
+                return "{ ... }";
+            }
         } else if (codegenProperty.isPrimitiveType) { // primitive type
             if (codegenProperty.isEnum) {
                 // When inline enum, set example to first allowable value