diff --git a/libguile/configure b/libguile/configure
index cc8e76eaa..e97af9916 100755
--- a/libguile/configure
+++ b/libguile/configure
@@ -541,7 +541,7 @@ EOF
 #define READER_EXTENSIONS 1
 EOF
 
-  LIBOBJS="debug.o srcprop.o $LIBOBJS"
+  LIBOBJS="backtrace.o stacks.o debug.o srcprop.o $LIBOBJS"
 fi
 
 #--------------------------------------------------------------------
diff --git a/libguile/configure.in b/libguile/configure.in
index 597a885f0..3bba3c2f7 100644
--- a/libguile/configure.in
+++ b/libguile/configure.in
@@ -14,7 +14,7 @@ AC_ARG_ENABLE(debug,
 if test "$enableval" != n && test "$enableval" != no; then
   AC_DEFINE(DEBUG_EXTENSIONS)
   AC_DEFINE(READER_EXTENSIONS)
-  LIBOBJS="debug.o srcprop.o $LIBOBJS"
+  LIBOBJS="backtrace.o stacks.o debug.o srcprop.o $LIBOBJS"
 fi
 
 #--------------------------------------------------------------------