diff --git a/src/base/io/io.c b/src/base/io/io.c
index 550ff7ddd..27e415407 100644
--- a/src/base/io/io.c
+++ b/src/base/io/io.c
@@ -1387,7 +1387,7 @@ int IoCommandWriteAiger( Abc_Frame_t * pAbc, int argc, char **argv )
     int c;
 
     fWriteSymbols = 0;
-    fCompact      = 1;
+    fCompact      = 0;
     fUnique       = 0;
     fVerbose      = 0;
     Extra_UtilGetoptReset();