diff --git a/configure/os/CONFIG.Common.SL6-x86 b/configure/os/CONFIG.Common.SL6-x86
index ade4001c5..a3e3cee77 100644
--- a/configure/os/CONFIG.Common.SL6-x86
+++ b/configure/os/CONFIG.Common.SL6-x86
@@ -1,6 +1,8 @@
 # Include definitions common to linux pentium targets
 include $(CONFIG)/os/CONFIG.Common.linux-x86
 
+COMMANDLINE_LIBRARY = READLINE
+
 OPT_CFLAGS += -g
 OPT_CXXFLAGS += -g
 
diff --git a/configure/os/CONFIG.Common.SL6-x86_64 b/configure/os/CONFIG.Common.SL6-x86_64
index e4e2dc386..f47c13320 100644
--- a/configure/os/CONFIG.Common.SL6-x86_64
+++ b/configure/os/CONFIG.Common.SL6-x86_64
@@ -1,6 +1,8 @@
 # Include definitions common to linux pentium targets
 include $(CONFIG)/os/CONFIG.Common.linux-x86_64
 
+COMMANDLINE_LIBRARY = READLINE
+
 OPT_CFLAGS += -g
 OPT_CXXFLAGS += -g