diff --git a/openttd.dsp b/openttd.dsp
--- a/openttd.dsp
+++ b/openttd.dsp
@@ -131,6 +131,10 @@ SOURCE=.\console_cmds.c
 # End Source File
 # Begin Source File
 
+SOURCE=.\currency.c
+# End Source File
+# Begin Source File
+
 SOURCE=.\debug.c
 # End Source File
 # Begin Source File
@@ -502,6 +506,10 @@ SOURCE=.\console.h
 # End Source File
 # Begin Source File
 
+SOURCE=.\currency.h
+# End Source File
+# Begin Source File
+
 SOURCE=.\debug.h
 # End Source File
 # Begin Source File
diff --git a/openttd.vcproj b/openttd.vcproj
--- a/openttd.vcproj
+++ b/openttd.vcproj
@@ -183,6 +183,9 @@
 				RelativePath=".\console_cmds.c">
 			</File>
 			<File
+				RelativePath=".\currency.c">
+			</File>
+			<File
 				RelativePath=".\debug.c">
 			</File>
 			<File
@@ -475,6 +478,9 @@
 				RelativePath="console.h">
 			</File>
 			<File
+				RelativePath=".\currency.h">
+			</File>
+			<File
 				RelativePath="debug.h">
 			</File>
 			<File