diff --git a/sdk/mx.sdk/mx_sdk_vm_impl.py b/sdk/mx.sdk/mx_sdk_vm_impl.py
index 0cf71c07c14f..ad7fafbd02a0 100644
--- a/sdk/mx.sdk/mx_sdk_vm_impl.py
+++ b/sdk/mx.sdk/mx_sdk_vm_impl.py
@@ -2994,7 +2994,7 @@ def base_jdk_version_info():
         if version_type == 'vendor':
             graalvm_suffix = ''
             if java_pre:
-                graalvm_suffix += '.' if graalvm_version.endsWith('dev') else '-'
+                graalvm_suffix += '.' if graalvm_version.endswith('dev') else '-'
                 graalvm_suffix += java_pre
         else:
             assert version_type == 'base-dir', version_type