diff --git a/C/index.c b/C/index.c
index 2d09df746..dda8c51a3 100755
--- a/C/index.c
+++ b/C/index.c
@@ -4167,12 +4167,12 @@ ExpandIndex(PredEntry *ap, int ExtraArgs, yamop *nextop USES_REGS) {
     if (!tmod) tmod = TermProlog;
 #if THREADS
     Yap_DebugPlWrite(MkIntegerTerm(worker_id));
-    Yap_DebugPutc(LOCAL_c_error_stream,' ');
+    Yap_DebugPutc(stderr,' ');
 #endif
-    Yap_DebugPutc(LOCAL_c_error_stream,'>');
-    Yap_DebugPutc(LOCAL_c_error_stream,'\t');
+    Yap_DebugPutc(stderr,'>');
+    Yap_DebugPutc(stderr,'\t');
     Yap_DebugPlWrite(tmod);
-    Yap_DebugPutc(LOCAL_c_error_stream,':');
+    Yap_DebugPutc(stderr,':');
     if (ap->ModuleOfPred == IDB_MODULE) {
       Term t = Deref(ARG1);
       if (IsAtomTerm(t)) {
@@ -4183,7 +4183,7 @@ ExpandIndex(PredEntry *ap, int ExtraArgs, yamop *nextop USES_REGS) {
 	Functor f = FunctorOfTerm(t);
 	Atom At = NameOfFunctor(f);
 	Yap_DebugPlWrite(MkAtomTerm(At));
-	Yap_DebugPutc(LOCAL_c_error_stream,'/');
+	Yap_DebugPutc(stderr,'/');
 	Yap_DebugPlWrite(MkIntegerTerm(ArityOfFunctor(f)));
       }
     } else {
@@ -4194,14 +4194,14 @@ ExpandIndex(PredEntry *ap, int ExtraArgs, yamop *nextop USES_REGS) {
 	Functor f = ap->FunctorOfPred;
 	Atom At = NameOfFunctor(f);
 	Yap_DebugPlWrite(MkAtomTerm(At));
-	Yap_DebugPutc(LOCAL_c_error_stream,'/');
+	Yap_DebugPutc(stderr,'/');
 	Yap_DebugPlWrite(MkIntegerTerm(ArityOfFunctor(f)));
       }
     }
-    Yap_DebugPutc(LOCAL_c_error_stream,'\n');
+    Yap_DebugPutc(stderr,'\n');
 #if THREADS
     Yap_DebugPlWrite(MkIntegerTerm(worker_id));
-    Yap_DebugPutc(LOCAL_c_error_stream,' ');
+    Yap_DebugPutc(stderr,' ');
 #endif
   }
 #endif
@@ -5650,10 +5650,10 @@ Yap_AddClauseToIndex(PredEntry *ap, yamop *beg, int first) {
   if (GLOBAL_Option['i' - 'a' + 1]) {
     Term tmod = ap->ModuleOfPred;
     if (!tmod) tmod = TermProlog;
-    Yap_DebugPutc(LOCAL_c_error_stream,'+');
-    Yap_DebugPutc(LOCAL_c_error_stream,'\t');
+    Yap_DebugPutc(stderr,'+');
+    Yap_DebugPutc(stderr,'\t');
     Yap_DebugPlWrite(tmod);
-    Yap_DebugPutc(LOCAL_c_error_stream,':');
+    Yap_DebugPutc(stderr,':');
     if (ap->ModuleOfPred == IDB_MODULE) {
       Term t = Deref(ARG1);
       if (IsAtomTerm(t)) {
@@ -5664,7 +5664,7 @@ Yap_AddClauseToIndex(PredEntry *ap, yamop *beg, int first) {
 	Functor f = FunctorOfTerm(t);
 	Atom At = NameOfFunctor(f);
 	Yap_DebugPlWrite(MkAtomTerm(At));
-	Yap_DebugPutc(LOCAL_c_error_stream,'/');
+	Yap_DebugPutc(stderr,'/');
 	Yap_DebugPlWrite(MkIntegerTerm(ArityOfFunctor(f)));
       }
     } else {
@@ -5675,11 +5675,11 @@ Yap_AddClauseToIndex(PredEntry *ap, yamop *beg, int first) {
 	Functor f = ap->FunctorOfPred;
 	Atom At = NameOfFunctor(f);
 	Yap_DebugPlWrite(MkAtomTerm(At));
-	Yap_DebugPutc(LOCAL_c_error_stream,'/');
+	Yap_DebugPutc(stderr,'/');
 	Yap_DebugPlWrite(MkIntegerTerm(ArityOfFunctor(f)));
       }
     }
-    Yap_DebugPutc(LOCAL_c_error_stream,'\n');
+    Yap_DebugPutc(stderr,'\n');
   }
 #endif
   stack = (path_stack_entry *)TR;
@@ -6130,10 +6130,10 @@ Yap_RemoveClauseFromIndex(PredEntry *ap, yamop *beg) {
     Term tmod = ap->ModuleOfPred;
 
     if (!tmod) tmod = TermProlog;
-    Yap_DebugPutc(LOCAL_c_error_stream,'-');
-    Yap_DebugPutc(LOCAL_c_error_stream,'\t');
+    Yap_DebugPutc(stderr,'-');
+    Yap_DebugPutc(stderr,'\t');
     Yap_DebugPlWrite(tmod);
-    Yap_DebugPutc(LOCAL_c_error_stream,':');
+    Yap_DebugPutc(stderr,':');
     if (ap->ModuleOfPred != IDB_MODULE) {
       if (ap->ArityOfPE == 0) {
 	Atom At = (Atom)ap->FunctorOfPred;
@@ -6142,7 +6142,7 @@ Yap_RemoveClauseFromIndex(PredEntry *ap, yamop *beg) {
 	Functor f = ap->FunctorOfPred;
 	Atom At = NameOfFunctor(f);
 	Yap_DebugPlWrite(MkAtomTerm(At));
-	Yap_DebugPutc(LOCAL_c_error_stream,'/');
+	Yap_DebugPutc(stderr,'/');
 	Yap_DebugPlWrite(MkIntegerTerm(ArityOfFunctor(f)));
       }
     } else {
@@ -6156,11 +6156,11 @@ Yap_RemoveClauseFromIndex(PredEntry *ap, yamop *beg) {
 	Functor f = ap->FunctorOfPred;
 	Atom At = NameOfFunctor(f);
 	Yap_DebugPlWrite(MkAtomTerm(At));
-	Yap_DebugPutc(LOCAL_c_error_stream,'/');
+	Yap_DebugPutc(stderr,'/');
 	Yap_DebugPlWrite(MkIntegerTerm(ArityOfFunctor(f)));
       }
     }
-    Yap_DebugPutc(LOCAL_c_error_stream,'\n');
+    Yap_DebugPutc(stderr,'\n');
   }
 #endif
   stack = (path_stack_entry *)TR;