diff --git a/include/compat/mingw/unordered_set b/include/compat/mingw/unordered_set
new file mode 100644
index 0000000..cd6ade8
--- /dev/null
+++ b/include/compat/mingw/unordered_set
@@ -0,0 +1 @@
+#include <tr1/unordered_set>
diff --git a/include/compat/osx/unordered_set b/include/compat/osx/unordered_set
new file mode 100644
index 0000000..cd6ade8
--- /dev/null
+++ b/include/compat/osx/unordered_set
@@ -0,0 +1 @@
+#include <tr1/unordered_set>