diff --git a/gradle/runtime.libs.versions.toml b/gradle/runtime.libs.versions.toml
index fe93550da..7031e3056 100644
--- a/gradle/runtime.libs.versions.toml
+++ b/gradle/runtime.libs.versions.toml
@@ -13,7 +13,7 @@ native-support = "1.0.1"
 
 # Forge Runtime depedencies
 javax-annotations = "3.0.2"
-forge-runtime = "2.0.9"
+forge-runtime = "2.0.9999"
 access-transformers = "3.0.1"
 access-transformers-new = "8.0.5"
 unprotect = "1.2.0"
@@ -37,6 +37,7 @@ javax-annotations = { module = "com.google.code.findbugs:jsr305", version.ref =
 mixin-remapper-service = { module = "dev.architectury:architectury-mixin-remapper-service", version.ref = "forge-runtime" }
 naming-service = { module = "dev.architectury:architectury-naming-service", version.ref = "forge-runtime" }
 mcp-annotations = { module = "dev.architectury:mcp-annotations", version.ref = "forge-runtime" }
+reflection-redirector = { module = "dev.architectury:architectury-reflection-redirector", version.ref = "forge-runtime" }
 access-transformers = { module = "net.minecraftforge:accesstransformers", version.ref = "access-transformers" }
 access-transformers-new = { module = "net.minecraftforge:accesstransformers", version.ref = "access-transformers-new" }
 unprotect = { module = "io.github.juuxel:unprotect", version.ref = "unprotect" }
diff --git a/src/main/java/net/fabricmc/loom/configuration/LoomConfigurations.java b/src/main/java/net/fabricmc/loom/configuration/LoomConfigurations.java
index 509aa975b..02185c66c 100644
--- a/src/main/java/net/fabricmc/loom/configuration/LoomConfigurations.java
+++ b/src/main/java/net/fabricmc/loom/configuration/LoomConfigurations.java
@@ -167,6 +167,11 @@ public void run() {
 				getDependencies().add(Constants.Configurations.FORGE_EXTRA, LoomVersions.MIXIN_REMAPPER_SERVICE.mavenNotation());
 				getDependencies().add(Constants.Configurations.FORGE_EXTRA, LoomVersions.MCP_ANNOTATIONS.mavenNotation());
 			}
+
+			// Add NeoForge-only dev-time dependencies
+			if (extension.isNeoForge()) {
+				getDependencies().add(Constants.Configurations.FORGE_EXTRA, LoomVersions.REFLECTION_REDIRECTOR.mavenNotation());
+			}
 		}
 	}
 
diff --git a/src/main/java/net/fabricmc/loom/task/launch/GenerateDLIConfigTask.java b/src/main/java/net/fabricmc/loom/task/launch/GenerateDLIConfigTask.java
index 5076220ed..0a74f466f 100644
--- a/src/main/java/net/fabricmc/loom/task/launch/GenerateDLIConfigTask.java
+++ b/src/main/java/net/fabricmc/loom/task/launch/GenerateDLIConfigTask.java
@@ -152,6 +152,13 @@ public void run() throws IOException {
 				}
 			}
 
+			if (getExtension().isNeoForge()) {
+				launchConfig
+						// See ArchitecturyReflectionRedirectorPlugin in forge-runtime
+						.property("architectury.reflectionredirector.sourceNamespace", intermediateNs)
+						.property("architectury.reflectionredirector.mappingsPath", mappingsPath);
+			}
+
 			ForgeRunsProvider forgeRunsProvider = getExtension().getForgeRunsProvider();
 			ConfigValue.Resolver configResolver = forgeRunsProvider.getResolver(null);