diff --git a/configure.in b/configure.in
index 3d16723..c1db5e3 100644
--- a/configure.in
+++ b/configure.in
@@ -8,13 +8,13 @@ AC_INIT
 	AC_SUBST(x_libraries)
 
 	AC_ARG_WITH(scsh-includes, [  --with-scsh-includes=DIR  scsh include files are in DIR [/usr/local/include]],
-		scsh_includes=$withval , scsh_includes=)
+		scsh_includes=$withval , scsh_includes=/usr/local/include)
 	AC_SUBST(scsh_includes)
 	AC_ARG_WITH(scsh-libraries, [  --with-scsh-libraries=DIR scsh libraries are in DIR [/usr/local/lib/scsh]],
 		scsh_libraries=$withval , scsh_libraries=/usr/local/lib/scsh)
 	AC_SUBST(scsh_libraries)
 	AC_ARG_WITH(scsh-modules, [  --with-scsh-modules=DIR scsh modules are in DIR [/usr/local/lib/scsh/modules]],
-		scsh_modules=$withval , scsh_libraries=/usr/local/lib/scsh/modules)
+		scsh_modules=$withval , scsh_modules=/usr/local/lib/scsh/modules)
 	AC_SUBST(scsh_modules)
 
 	#AC_MSG_CHECKING(scsh installation)