diff --git a/legend-pure-core/legend-pure-m3-core/src/main/java/org/finos/legend/pure/m3/serialization/compiler/metadata/ModuleMetadataSerializer.java b/legend-pure-core/legend-pure-m3-core/src/main/java/org/finos/legend/pure/m3/serialization/compiler/metadata/ModuleMetadataSerializer.java
index fa30b299ee..956f5c4bbc 100644
--- a/legend-pure-core/legend-pure-m3-core/src/main/java/org/finos/legend/pure/m3/serialization/compiler/metadata/ModuleMetadataSerializer.java
+++ b/legend-pure-core/legend-pure-m3-core/src/main/java/org/finos/legend/pure/m3/serialization/compiler/metadata/ModuleMetadataSerializer.java
@@ -26,7 +26,7 @@
 
 public class ModuleMetadataSerializer extends ExtensibleSerializer<ModuleMetadataSerializerExtension>
 {
-    private static final long LEGEND_MODULE_METADATA_SIGNATURE = Long.parseLong("LegendModule", 32);
+    private static final long PURE_MODULE_METADATA_SIGNATURE = Long.parseLong("PureModule", 36);
 
     private final StringIndexer stringIndexer;
 
@@ -48,7 +48,7 @@ public void serialize(Writer writer, ModuleMetadata metadata, int version)
 
     private void serialize(Writer writer, ModuleMetadata metadata, ModuleMetadataSerializerExtension extension)
     {
-        writer.writeLong(LEGEND_MODULE_METADATA_SIGNATURE);
+        writer.writeLong(PURE_MODULE_METADATA_SIGNATURE);
         writer.writeInt(extension.version());
         Writer stringIndexedWriter = this.stringIndexer.writeStringIndex(writer, collectStrings(metadata));
         extension.serialize(stringIndexedWriter, metadata);
@@ -57,7 +57,7 @@ private void serialize(Writer writer, ModuleMetadata metadata, ModuleMetadataSer
     public ModuleMetadata deserialize(Reader reader)
     {
         long signature = reader.readLong();
-        if (signature != LEGEND_MODULE_METADATA_SIGNATURE)
+        if (signature != PURE_MODULE_METADATA_SIGNATURE)
         {
             throw new IllegalArgumentException("Invalid file format: not a Legend module metadata file");
         }