--- a/configure.ac
+++ b/configure.ac
@@ -125,9 +125,8 @@
 	if test ! -f "$WHERE_FTPATH/include/ftlib.h"; then
 		AC_MSG_ERROR(ftlib.h file not found in flow-tools directory '$WHERE_FTPATH'. Use --with-ftpath=PATH)
 	fi
-	if test ! -f "$WHERE_FTPATH/lib/libft.a" -a -f "$WHERE_FTPATH/lib64/libft.a" ! -f "$WHERE_FTPATH/lib/libft.so" -a -f "$WHERE_FTPATH/lib64/libft.so"; then
-		AC_MSG_ERROR(libft.a not found in flow-tools directory '$WHERE_FTPATH'. Build flow tools first)
-	fi
+	AC_CHECK_LIB([ft], [main],,
+		AC_MSG_ERROR(libft not found in flow-tools directory '$WHERE_FTPATH'. Build flow tools first))
 	FT_INCLUDES="-I$WHERE_FTPATH/include -I$WHERE_FTPATH/lib"
 	FT_LDFLAGS="-L$WHERE_FTPATH/lib"
 else