diff --git a/fabric-data-generation-api-v1/src/main/java/net/fabricmc/fabric/api/datagen/v1/provider/FabricDynamicRegistryProvider.java b/fabric-data-generation-api-v1/src/main/java/net/fabricmc/fabric/api/datagen/v1/provider/FabricDynamicRegistryProvider.java
index f64f1ea837..667f114e18 100644
--- a/fabric-data-generation-api-v1/src/main/java/net/fabricmc/fabric/api/datagen/v1/provider/FabricDynamicRegistryProvider.java
+++ b/fabric-data-generation-api-v1/src/main/java/net/fabricmc/fabric/api/datagen/v1/provider/FabricDynamicRegistryProvider.java
@@ -82,6 +82,8 @@ public static final class Entries {
 		Entries(RegistryWrapper.WrapperLookup registries, String modId) {
 			this.registries = registries;
 			this.queuedEntries = DynamicRegistries.getDynamicRegistries().stream()
+					// Some modded dynamic registries might not be in the wrapper lookup, filter them out
+					.filter(e -> registries.getOptionalWrapper(e.key()).isPresent())
 					.collect(Collectors.toMap(
 							e -> e.key().getValue(),
 							e -> RegistryEntries.create(registries, e)
diff --git a/fabric-data-generation-api-v1/src/testmod/java/net/fabricmc/fabric/test/datagen/DataGeneratorTestContent.java b/fabric-data-generation-api-v1/src/testmod/java/net/fabricmc/fabric/test/datagen/DataGeneratorTestContent.java
index f48369883b..b367cc0578 100644
--- a/fabric-data-generation-api-v1/src/testmod/java/net/fabricmc/fabric/test/datagen/DataGeneratorTestContent.java
+++ b/fabric-data-generation-api-v1/src/testmod/java/net/fabricmc/fabric/test/datagen/DataGeneratorTestContent.java
@@ -56,6 +56,9 @@ public class DataGeneratorTestContent implements ModInitializer {
 			TEST_DATAGEN_DYNAMIC_REGISTRY_KEY,
 			new Identifier(MOD_ID, "tiny_potato")
 	);
+	// Empty registry
+	public static final RegistryKey<Registry<TestDatagenObject>> TEST_DATAGEN_DYNAMIC_EMPTY_REGISTRY_KEY =
+			RegistryKey.ofRegistry(new Identifier("fabric", "test_datagen_dynamic_empty"));
 
 	@Override
 	public void onInitialize() {
@@ -73,6 +76,7 @@ public void onInitialize() {
 				.build());
 
 		DynamicRegistries.register(TEST_DATAGEN_DYNAMIC_REGISTRY_KEY, TestDatagenObject.CODEC);
+		DynamicRegistries.register(TEST_DATAGEN_DYNAMIC_EMPTY_REGISTRY_KEY, TestDatagenObject.CODEC);
 	}
 
 	private static Block createBlock(String name, boolean hasItem, AbstractBlock.Settings settings) {
diff --git a/fabric-data-generation-api-v1/src/testmod/java/net/fabricmc/fabric/test/datagen/DataGeneratorTestEntrypoint.java b/fabric-data-generation-api-v1/src/testmod/java/net/fabricmc/fabric/test/datagen/DataGeneratorTestEntrypoint.java
index 43b4361ec1..0b09e9c89b 100644
--- a/fabric-data-generation-api-v1/src/testmod/java/net/fabricmc/fabric/test/datagen/DataGeneratorTestEntrypoint.java
+++ b/fabric-data-generation-api-v1/src/testmod/java/net/fabricmc/fabric/test/datagen/DataGeneratorTestEntrypoint.java
@@ -132,6 +132,7 @@ public void buildRegistry(RegistryBuilder registryBuilder) {
 				TEST_DATAGEN_DYNAMIC_REGISTRY_KEY,
 				this::bootstrapTestDatagenRegistry
 		);
+		// do NOT add TEST_DATAGEN_DYNAMIC_EMPTY_REGISTRY_KEY, should still work without it
 	}
 
 	private void bootstrapTestDatagenRegistry(Registerable<DataGeneratorTestContent.TestDatagenObject> registerable) {