diff --git a/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/ElixirClientCodegen.java b/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/ElixirClientCodegen.java
index b731c4f8e45..204c32fb5d7 100644
--- a/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/ElixirClientCodegen.java
+++ b/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/ElixirClientCodegen.java
@@ -654,6 +654,8 @@ public class ElixirClientCodegen extends DefaultCodegen implements CodegenConfig
                 sb.append(param.dataType);
             } else if (param.isFile || param.isBinary) {
                 sb.append("String.t");
+            } else if (param.dataFormat != null) {
+                sb.append(param.dataType);
             } else {
                 // <module>.Model.<type>.t
                 sb.append(moduleName);