diff --git a/configure.ac b/configure.ac
index b5c7054..8bd6bfb 100644
--- a/configure.ac
+++ b/configure.ac
@@ -278,7 +278,7 @@ if test "x$ax_cv_have_TINFO" = xno ; then
     old_LDFLAGS="$LDFLAGS"
     old_CPPFLAGS="$CPPFLAGS"
     LDFLAGS="$LDFLAGS $CURSES_LDFLAGS"
-    CPPFLAGS="$LDFLAGS $CURSES_CPPFLAGS"
+    CPPFLAGS="$CPPFLAGS $CURSES_CPPFLAGS"
 
     AX_WITH_CURSES
     # restore old LDFLAGS/CPPFLAGS