diff --git a/libs/pbd/MSVCpbd/pbd.vcproj b/libs/pbd/MSVCpbd/pbd.vcproj
index e86a0ee53b..f0cf7d40a6 100644
--- a/libs/pbd/MSVCpbd/pbd.vcproj
+++ b/libs/pbd/MSVCpbd/pbd.vcproj
@@ -370,6 +370,10 @@
 				RelativePath="..\md5.cc"
 				>
 			</File>
+			<File
+				RelativePath="..\microseconds.cc"
+				>
+			</File>
 			<File
 				RelativePath="..\mountpoint.cc"
 				>
@@ -720,6 +724,10 @@
 				RelativePath="..\pbd\memento_command.h"
 				>
 			</File>
+			<File
+				RelativePath="..\pbd\microseconds.h"
+				>
+			</File>
 			<File
 				RelativePath="..\pbd\msvc_pbd.h"
 				>