diff --git a/substratevm/src/com.oracle.svm.core/src/com/oracle/svm/core/SubstrateOptions.java b/substratevm/src/com.oracle.svm.core/src/com/oracle/svm/core/SubstrateOptions.java
index 46cf946a543d..067e7a5b3774 100644
--- a/substratevm/src/com.oracle.svm.core/src/com/oracle/svm/core/SubstrateOptions.java
+++ b/substratevm/src/com.oracle.svm.core/src/com/oracle/svm/core/SubstrateOptions.java
@@ -373,8 +373,8 @@ protected void onValueUpdate(EconomicMap<OptionKey<?>, Object> values, Boolean o
     @Option(help = "The size of each thread stack at run-time, in bytes.", type = OptionType.User)//
     public static final RuntimeOptionKey<Long> StackSize = new RuntimeOptionKey<>(0L);
 
-    @Option(help = "The size of each internal thread stack, in bytes.", type = OptionType.Expert)//
-    public static final HostedOptionKey<Long> InternalThreadStackSize = new HostedOptionKey<>(2L * 1024 * 1024);
+    @Option(help = "Deprecated, has no effect.", deprecated = true) //
+    public static final HostedOptionKey<Long> InternalThreadStackSize = new HostedOptionKey<>(0L);
 
     /**
      * Cached value of {@link ConcealedOptions#MaxJavaStackTraceDepth}. Also used as default value.