diff --git a/libs/pbd/MSVCpbd/pbd.vcproj b/libs/pbd/MSVCpbd/pbd.vcproj
index d41933286b..3c6d962df3 100644
--- a/libs/pbd/MSVCpbd/pbd.vcproj
+++ b/libs/pbd/MSVCpbd/pbd.vcproj
@@ -357,6 +357,10 @@
 				RelativePath="..\malign.cc"
 				>
 			</File>
+			<File
+				RelativePath="..\md5.cc"
+				>
+			</File>
 			<File
 				RelativePath="..\mountpoint.cc"
 				>
@@ -687,6 +691,10 @@
 				RelativePath="..\pbd\localtime_r.h"
 				>
 			</File>
+			<File
+				RelativePath="..\pbd\md5.h"
+				>
+			</File>
 			<File
 				RelativePath="..\pbd\memento_command.h"
 				>
diff --git a/libs/pbd/pbd/md5.h b/libs/pbd/pbd/md5.h
index cf0d0e80eb..80f45bc8ea 100644
--- a/libs/pbd/pbd/md5.h
+++ b/libs/pbd/pbd/md5.h
@@ -26,7 +26,9 @@
 #include <string.h>
 #include <stdint.h>
 
-class MD5
+#include "pbd/libpbd_visibility.h"
+
+class LIBPBD_API MD5
 {
     public:
 	MD5();