diff --git a/substratevm/src/com.oracle.svm.hosted/src/com/oracle/svm/hosted/classinitialization/ClassInitializationFeature.java b/substratevm/src/com.oracle.svm.hosted/src/com/oracle/svm/hosted/classinitialization/ClassInitializationFeature.java
index 88bb33967630..193aa810400e 100644
--- a/substratevm/src/com.oracle.svm.hosted/src/com/oracle/svm/hosted/classinitialization/ClassInitializationFeature.java
+++ b/substratevm/src/com.oracle.svm.hosted/src/com/oracle/svm/hosted/classinitialization/ClassInitializationFeature.java
@@ -169,6 +169,7 @@ private Object checkImageHeapInstance(Object obj) {
             });
 
             if (ClassInitializationOptions.StrictImageHeap.getValue()) {
+                msg += System.lineSeparator();
                 msg += """
                                 If you are seeing this message after enabling %s, this means that some objects ended up in the image heap without their type being marked with --initialize-at-build-time.
                                 To fix this, include %s in your configuration. If the classes do not originate from your code, it is advised to update all library or framework dependencies to the latest version before addressing this error.
@@ -176,8 +177,9 @@ private Object checkImageHeapInstance(Object obj) {
                                 """
                                 .replaceAll("\n", System.lineSeparator())
                                 .formatted(
-                                                SubstrateOptionsParser.commandArgument(ClassInitializationOptions.StrictImageHeap, typeName, "strict-image-heap", true, false),
-                                                SubstrateOptionsParser.commandArgument(ClassInitializationOptions.ClassInitialization, typeName, "initialize-at-build-time", true, false));
+                                                SubstrateOptionsParser.commandArgument(ClassInitializationOptions.StrictImageHeap, "+", "strict-image-heap", true, false),
+                                                SubstrateOptionsParser.commandArgument(ClassInitializationOptions.ClassInitialization, proxyOrLambda ? proxyLambdaInterfaceCSV : typeName,
+                                                                "initialize-at-build-time", true, false));
             }
 
             msg += System.lineSeparator() + "The following detailed trace displays from which field in the code the object was reached.";