diff --git a/C/heapgc.c b/C/heapgc.c
index 4ae5c9d39..a1459b6a2 100644
--- a/C/heapgc.c
+++ b/C/heapgc.c
@@ -3765,10 +3765,9 @@ call_gc(UInt gc_lim, Int predarity, CELL *current_env, yamop *nextop)
   if (gc_margin < gc_lim)
     gc_margin = gc_lim;
   GcCalls++;
-  if (gc_on && !(Yap_PrologMode & InErrorMode) //&&
-      /* make sure there is a point in collecting th eheap */
-      //H-H0 > (LCL0-ASP)/2) {
-      ) {
+  if (gc_on && !(Yap_PrologMode & InErrorMode) &&
+      /* make sure there is a point in collecting the heap */
+      H-H0 > (LCL0-ASP)/2) {
     effectiveness = do_gc(predarity, current_env, nextop);
     if (effectiveness > 90) {
       while (gc_margin < H-H0)