diff --git a/src/opus_decoder.c b/src/opus_decoder.c
index 18262322ac18c4fa2c967388de5a9a545334be72..167e4e4891e66dce7a65a6ca761fb58fb190267a 100644
--- a/src/opus_decoder.c
+++ b/src/opus_decoder.c
@@ -30,7 +30,7 @@
 #endif
 
 #ifndef OPUS_BUILD
-#error "OPUS_BUILD _MUST_ be defined to build Opus and you probably want a decent config.h, see README for more details."
+#error "OPUS_BUILD _MUST_ be defined to build Opus. This probably means you need other defines as well, as in a config.h. See the included build files for details."
 #endif
 
 #include <stdarg.h>