diff --git a/Makefile.am b/Makefile.am
index be87c2c..e156dfe 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -1,10 +1,20 @@
 GHC_OPTS = \
 	-fglasgow-exts \
+	-fwarn-deprecations \
+	-fwarn-duplicate-exports \
+	-fwarn-missing-fields \
+	-fwarn-missing-methods \
+	-fwarn-overlapping-patterns \
+	-fwarn-simple-patterns \
+	-fwarn-type-defaults \
 	-fwarn-unused-binds \
 	-fwarn-unused-imports \
-	-fwarn-type-defaults \
 	-ibackends -ichecks -icommon -ifrontends -itransformations
 
+# TODO turn on this option too:
+#	-fwarn-missing-signatures
+
+
 if GHC68
 GHC_OPTS += -XUndecidableInstances -fwarn-tabs -fwarn-monomorphism-restriction
 else