--- examples/ratop/Makefile.in.orig	Fri Jan 23 21:04:33 2015
+++ examples/ratop/Makefile.in	Fri Jan 23 21:04:49 2015
@@ -93,7 +93,7 @@ PROGS = $(INSTALLBIN)/ratop
 all: $(PROGS)
 
 $(INSTALLBIN)/ratop: $(OBJ) $(LIB)
-	$(CC) $(CFLAGS) -o $@ $(OBJ) $(LDFLAGS) $(LIB) $(COMPATLIB) $(CURSESLIB)
+	$(CC) $(CFLAGS) -o $@ $(OBJ) $(LDFLAGS) $(LIB) $(COMPATLIB) $(CURSESLIB) -lpthread
 
 CLEANFILES = $(OBJ) $(PROGS)