diff --git a/reactos/lib/psapi/.cvsignore b/reactos/lib/psapi/.cvsignore
new file mode 100644
index 00000000000..c66d7a94736
--- /dev/null
+++ b/reactos/lib/psapi/.cvsignore
@@ -0,0 +1,9 @@
+base.tmp
+junk.tmp
+psapi.sym
+psapi.coff
+psapi.dll
+psapi.nostrip.dll
+temp.exp
+*.o
+.*.d
\ No newline at end of file
diff --git a/reactos/lib/psapi/misc/.cvsignore b/reactos/lib/psapi/misc/.cvsignore
new file mode 100644
index 00000000000..b2bf6455490
--- /dev/null
+++ b/reactos/lib/psapi/misc/.cvsignore
@@ -0,0 +1,2 @@
+*.o
+.*.d
\ No newline at end of file
diff --git a/reactos/lib/rosrtl/thread/.cvsignore b/reactos/lib/rosrtl/thread/.cvsignore
new file mode 100644
index 00000000000..b2bf6455490
--- /dev/null
+++ b/reactos/lib/rosrtl/thread/.cvsignore
@@ -0,0 +1,2 @@
+*.o
+.*.d
\ No newline at end of file