diff --git a/NEWS b/NEWS
index 18019b87..b4148dd2 100644
--- a/NEWS
+++ b/NEWS
@@ -4,6 +4,9 @@
   github PR 16)
 - libout123: Use strtok_r() to avoid conflicts multithreaded contexts
   (both sides should avoid plain strtok()!).
+- libmpg123:
+-- Un-break DLL builds that need I/O functions defined in libmpg123.c
+   (like mpg123_open(), bug 374).
 
 1.32.9
 ------
diff --git a/src/libmpg123/mpg123lib_intern.h b/src/libmpg123/mpg123lib_intern.h
index b46c4197..7cd5504d 100644
--- a/src/libmpg123/mpg123lib_intern.h
+++ b/src/libmpg123/mpg123lib_intern.h
@@ -21,7 +21,10 @@
 
 // Only portable API plays a role in the library itself, outside of lfs_wrap.c.
 // Also, we need to ensure no suffix renaming for the primary implementations.
-#define MPG123_PORTABLE_API
+// But: The _definition_ of non-portable API needs to be present for those
+// primary implementations being exported for DLL builds. Just the largefile
+// renaming needs to be skipped!
+#define MPG123_NO_LARGENAME
 #define MPG123_ENUM_API
 #include "mpg123.h"