diff --git a/src/libs/pdflib/libs/flate/zconf.h b/src/libs/pdflib/libs/flate/zconf.h
index dd807e5b02..06b296f2bc 100644
--- a/src/libs/pdflib/libs/flate/zconf.h
+++ b/src/libs/pdflib/libs/flate/zconf.h
@@ -292,7 +292,7 @@
 #  endif
 #endif
 
-#if defined (__BEOS__)
+#if defined (__BEOS__) && !defined(__HAIKU__)
 #  if defined (ZLIB_DLL)
 #    define ZEXTERN extern __declspec(dllexport)
 #  else