diff --git a/Swiftgram/SGDebugUI/BUILD b/Swiftgram/SGDebugUI/BUILD
index c3a6130f24..adaf1d3e41 100644
--- a/Swiftgram/SGDebugUI/BUILD
+++ b/Swiftgram/SGDebugUI/BUILD
@@ -7,10 +7,20 @@ config_setting(
     },
 )
 
+config_setting(
+    name = "fastbuild_build",
+    values = {
+        "compilation_mode": "fastbuild",
+    },
+)
+
 flex_dependency = select({
     ":debug_build": [
         "@flex_sdk//:FLEX"
     ],
+    ":fastbuild_build": [
+        "@flex_sdk//:FLEX"
+    ],
     "//conditions:default": [],
 })