diff --git a/src/aig/gia/giaGig.c b/src/aig/gia/giaGig.c
index b3ea1770a..f1a661d8d 100644
--- a/src/aig/gia/giaGig.c
+++ b/src/aig/gia/giaGig.c
@@ -29,7 +29,7 @@ ABC_NAMESPACE_IMPL_START
 ///                        DECLARATIONS                              ///
 ////////////////////////////////////////////////////////////////////////
 
-typedef enum { 
+enum { 
     GIG_NONE   =  0,
     GIG_RESET  =  1,
     GIG_PI     =  2,