diff --git a/libraries/terminfo/configure b/libraries/terminfo/configure
index 9c66cad..30ade23 100755
--- a/libraries/terminfo/configure
+++ b/libraries/terminfo/configure
@@ -1821,7 +1821,7 @@ if test "x$curses_libraries" != "xNONE"; then
   TERMINFO_LIB_DIRS=$curses_libraries
 fi
 
-if test "x$curses_library" == "xNONE"; then
+if test "x$curses_library" = "xNONE"; then
 ac_ext=c
 ac_cpp='$CPP $CPPFLAGS'
 ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'