diff --git a/visualc_net/dosbox.vcproj b/visualc_net/dosbox.vcproj
index dcfe14fd..7d62ff31 100644
--- a/visualc_net/dosbox.vcproj
+++ b/visualc_net/dosbox.vcproj
@@ -568,6 +568,9 @@
 					<Filter
 						Name="mame"
 						Filter="">
+						<File
+							RelativePath="..\src\hardware\mame\emu.h">
+						</File>
 						<File
 							RelativePath="..\src\hardware\mame\fmopl.cpp">
 						</File>