--- configure.ac.orig	2022-05-06 23:16:39 UTC
+++ configure.ac
@@ -22,7 +22,7 @@ AC_ARG_ENABLE([mad],
     [AS_HELP_STRING([--disable-mad], [disable libmad handling of mp3 files])])
 
 AS_IF([test "x$enable_mad" != "xno"] , [
-    PKG_CHECK_MODULES(MAD, mad >= 0.15 \
+    PKG_CHECK_MODULES(MAD, libmad >= 0.15 \
                            id3tag >= 0.15)
     AC_SUBST(MAD_CFLAGS)
     AC_SUBST(MAD_LIBS)