diff --git a/ext/MaskedVByte/include/varintencode.h b/ext/MaskedVByte/include/varintencode.h
new file mode 100644
index 0000000..2183968
--- /dev/null
+++ b/ext/MaskedVByte/include/varintencode.h
@@ -0,0 +1,18 @@
+
+#ifndef VARINTENCODE_H_
+#define VARINTENCODE_H_
+
+#include <stdint.h> // please use a C99-compatible compiler
+#include <stddef.h>
+
+// Encode an array of a given length read from in to bout in varint format.
+// Returns the number of bytes written.
+size_t vbyte_encode(uint32_t *in, size_t length, uint8_t *bout);
+
+// Encode an array of a given length read from in to bout in varint format with differential
+// coding starting at value prev. (Setting prev to 0 is a good default.)
+// Returns the number of bytes written.
+size_t vbyte_encode_delta(uint32_t *in, size_t length, uint8_t *bout, uint32_t prev);
+
+
+#endif /* VARINTENCODE_H_ */