diff --git a/src/aig/saig/saigIso.c b/src/aig/saig/saigIso.c
index 1c319af76..14a488adb 100644
--- a/src/aig/saig/saigIso.c
+++ b/src/aig/saig/saigIso.c
@@ -574,9 +574,12 @@ Aig_Man_t * Saig_ManIsoReduce( Aig_Man_t * pAig, Vec_Ptr_t ** pvPosEquivs, int f
     return pPart;
 }
 
+ABC_NAMESPACE_IMPL_END
 
 #include "base/abc/abc.h"
 
+ABC_NAMESPACE_IMPL_START
+
 /**Function*************************************************************
 
   Synopsis    []