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 2d0a5f6e5b02..943bda4bdc14 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
@@ -1558,6 +1558,7 @@ protected void initalizeSpecialCharacterMapping() {
         specialCharReplacements.put("<=", "Less_Than_Or_Equal_To");
         specialCharReplacements.put(">=", "Greater_Than_Or_Equal_To");
         specialCharReplacements.put("!=", "Not_Equal");
+        specialCharReplacements.put("~=", "Tilde_Equal");
     }
 
     /**