diff --git a/prism-core/src/main/java/io/avaje/prism/internal/ModuleInfoReaderWriter.java b/prism-core/src/main/java/io/avaje/prism/internal/ModuleInfoReaderWriter.java
index d3dfb8f..2be1a21 100644
--- a/prism-core/src/main/java/io/avaje/prism/internal/ModuleInfoReaderWriter.java
+++ b/prism-core/src/main/java/io/avaje/prism/internal/ModuleInfoReaderWriter.java
@@ -201,7 +201,7 @@ public static void write(PrintWriter out, String packageName) {
             + "   * @param implementations the implementations to verify the presence of\n"
             + "   */\n"
             + "  public void validateServices(String providesType, Collection<String> implementations) {\n"
-            + "    if (!buildPluginAvailable() || !moduleElement.isUnnamed()) {\n"
+            + "    if (buildPluginAvailable() || moduleElement.isUnnamed()) {\n"
             + "      return;\n"
             + "    }\n"
             + "    var implSet = new TreeSet<>(implementations);\n"