diff --git a/src/base/abci/abc.c b/src/base/abci/abc.c
index f9d7ed4c8..5dab06f8a 100644
--- a/src/base/abci/abc.c
+++ b/src/base/abci/abc.c
@@ -30619,6 +30619,9 @@ int Abc_CommandAbc9SaveAig( Abc_Frame_t * pAbc, int argc, char ** argv )
     {
         switch ( c )
         {
+        case 'a':
+            fArea ^= 1;
+            break;
         case 'h':
             goto usage;
         default: