diff --git a/src/MCHybridSOG.cpp b/src/MCHybridSOG.cpp
index aba446daa96cb36d57a5ea561bb5bd09f431102d..574dbc99e84cd476ed150cce7445a2b2d8a760df 100644
--- a/src/MCHybridSOG.cpp
+++ b/src/MCHybridSOG.cpp
@@ -24,7 +24,7 @@
 #define TAG_ACK_STATE 10
 #define TAG_ACK_SUCC 11
 #define TAG_NOTCOMPLETED 20
-#define DEBUG_GC 1
+//#define DEBUG_GC 1
 using namespace sylvan;
 using namespace std;
 MCHybridSOG::MCHybridSOG ( const NewNet &R,MPI_Comm &comm_world,bool init )