diff --git a/win/vc90/BBGE.vcproj b/win/vc90/BBGE.vcproj
index b6cf501..ef5d40e 100644
--- a/win/vc90/BBGE.vcproj
+++ b/win/vc90/BBGE.vcproj
@@ -352,10 +352,6 @@
 				RelativePath="..\..\BBGE\ParticleManager.cpp"
 				>
 			</File>
-			<File
-				RelativePath="..\..\BBGE\Particles.cpp"
-				>
-			</File>
 			<File
 				RelativePath="..\..\BBGE\Particles.h"
 				>
diff --git a/win/vc90/external.vcproj b/win/vc90/external.vcproj
index 0eb936d..ef30d30 100644
--- a/win/vc90/external.vcproj
+++ b/win/vc90/external.vcproj
@@ -1219,6 +1219,10 @@
 			Filter="h;hpp;hxx;hm;inl;inc;xsd"
 			UniqueIdentifier="{93995380-89BD-4b04-88EB-625FBE52EBFB}"
 			>
+			<File
+				RelativePath="..\..\ExternalLibs\algorithmx.h"
+				>
+			</File>
 			<Filter
 				Name="FTGL"
 				>