diff --git a/src/tools/msvc/MSBuildProject.pm b/src/tools/msvc/MSBuildProject.pm
index e1c8d81549..37958f95b5 100644
--- a/src/tools/msvc/MSBuildProject.pm
+++ b/src/tools/msvc/MSBuildProject.pm
@@ -127,7 +127,7 @@ EOF
 	foreach my $fileNameWithPath (sort keys %{ $self->{files} })
 	{
 		confess "Bad format filename '$fileNameWithPath'\n"
-		  unless ($fileNameWithPath =~ /^(.*)\\([^\\]+)\.[r]?[cyl]$/);
+		  unless ($fileNameWithPath =~ /^(.*)\\([^\\]+)\.(c|cpp|y|l|rc)$/);
 		my $dir      = $1;
 		my $fileName = $2;
 		if ($fileNameWithPath =~ /\.y$/ or $fileNameWithPath =~ /\.l$/)
diff --git a/src/tools/msvc/VCBuildProject.pm b/src/tools/msvc/VCBuildProject.pm
index 335a1f016d..513cfb5796 100644
--- a/src/tools/msvc/VCBuildProject.pm
+++ b/src/tools/msvc/VCBuildProject.pm
@@ -71,7 +71,7 @@ EOF
 	foreach my $fileNameWithPath (sort keys %{ $self->{files} })
 	{
 		confess "Bad format filename '$fileNameWithPath'\n"
-		  unless ($fileNameWithPath =~ /^(.*)\\([^\\]+)\.[r]?[cyl]$/);
+		  unless ($fileNameWithPath =~ /^(.*)\\([^\\]+)\.(c|cpp|y|l|rc)$/);
 		my $dir  = $1;
 		my $file = $2;