diff --git a/dudeswave/src/Makefile b/dudeswave/src/Makefile
index 4a86db2..8a14b81 100644
--- a/dudeswave/src/Makefile
+++ b/dudeswave/src/Makefile
@@ -3,7 +3,7 @@
 
 ERLC?=	erlc -server
 
-ERLOPTS=	-I ../../
+ERLFLAGS=	-I ../../
 
 OBJS=	dudeswave.beam dudeswave_app.beam
 OBJS+=	dudeswave_supervisor.beam dudeswave_handler.beam
diff --git a/ranch/src/Makefile b/ranch/src/Makefile
index 4bd8ad2..2943853 100644
--- a/ranch/src/Makefile
+++ b/ranch/src/Makefile
@@ -2,7 +2,7 @@
 .SUFFIXES: .erl .beam
 
 ERLC?=		erlc -server -pa ${PWD}
-ERLFLAGS+=	+warn_missing_spec +warn_untyped_record
+ERLOPTS+=	+warn_missing_spec +warn_untyped_record
 
 OBJS=	ranch_transport.beam ranch.beam ranch_acceptor.beam ranch_acceptors_sup.beam
 OBJS+=	ranch_conns_sup.beam ranch_conns_sup_sup.beam ranch_crc32c.beam
diff --git a/storage/src/Makefile b/storage/src/Makefile
index 265ec8f..61dfe85 100644
--- a/storage/src/Makefile
+++ b/storage/src/Makefile
@@ -3,8 +3,7 @@
 
 ERLC?=		erlc -server
 
-ERLOPTS+=	-I ../../
-
+ERLFLAGS+=	-I ../../
 
 OBJS=	storage.beam storage_app.beam
 OBJS+=	storage_supervisor.beam