diff --git a/src/compiler/GF/Infra/BuildInfo.hs b/src/compiler/GF/Infra/BuildInfo.hs
index 127c7f6f3..2ff770393 100644
--- a/src/compiler/GF/Infra/BuildInfo.hs
+++ b/src/compiler/GF/Infra/BuildInfo.hs
@@ -1,7 +1,15 @@
+{-# LANGUAGE CPP #-}
 module GF.Infra.BuildInfo where
 import System.Info
 import Data.Version(showVersion)
 
 buildInfo =
     "Built on "++os++"/"++arch
-    ++" with "++compilerName++"-"++showVersion compilerVersion
\ No newline at end of file
+    ++" with "++compilerName++"-"++showVersion compilerVersion
+    ++", flags:"
+#ifdef USE_INTERRUPT
+    ++" interrupt"
+#endif
+#ifdef SERVER_MODE
+    ++" server"
+#endif