diff --git a/modules/openapi-generator/src/main/java/org/openapitools/codegen/DefaultCodegen.java b/modules/openapi-generator/src/main/java/org/openapitools/codegen/DefaultCodegen.java
index 2874cbfd29b..a56134e5070 100644
--- a/modules/openapi-generator/src/main/java/org/openapitools/codegen/DefaultCodegen.java
+++ b/modules/openapi-generator/src/main/java/org/openapitools/codegen/DefaultCodegen.java
@@ -1609,7 +1609,7 @@ public class DefaultCodegen implements CodegenConfig {
      * @return capitalized model name
      */
     public String toModelName(final String name) {
-        return initialCaps(modelNamePrefix + name + modelNameSuffix);
+        return initialCaps(modelNamePrefix + "_" + name + "_" + modelNameSuffix);
     }
 
     /**
diff --git a/modules/openapi-generator/src/main/java/org/openapitools/codegen/InlineModelResolver.java b/modules/openapi-generator/src/main/java/org/openapitools/codegen/InlineModelResolver.java
index 64a3d947999..20120634dcd 100644
--- a/modules/openapi-generator/src/main/java/org/openapitools/codegen/InlineModelResolver.java
+++ b/modules/openapi-generator/src/main/java/org/openapitools/codegen/InlineModelResolver.java
@@ -420,6 +420,7 @@ public class InlineModelResolver {
         }
         int count = 0;
         boolean done = false;
+        key = key.replaceAll("/", "_"); // e.g. /me/videos => _me_videos
         key = key.replaceAll("[^a-z_\\.A-Z0-9 ]", ""); // FIXME: a parameter
         // should not be assigned. Also declare the methods parameters as 'final'.
         while (!done) {