diff --git a/makefile.unix b/makefile.unix
index 161f4510..394bc292 100644
--- a/makefile.unix
+++ b/makefile.unix
@@ -122,6 +122,7 @@ LIBWEBPMUX_OBJS = $(MUX_OBJS)
 HDRS = \
     src/dec/vp8i.h \
     src/dec/vp8li.h \
+    src/dec/webpi.h \
     src/dsp/dsp.h \
     src/dsp/lossless.h \
     src/dsp/yuv.h \
@@ -133,10 +134,15 @@ HDRS = \
     src/utils/color_cache.h \
     src/utils/filters.h \
     src/utils/huffman.h \
+    src/utils/rescaler.h \
     src/utils/tcoder.h \
+    src/utils/tcoderi.h \
     src/utils/thread.h \
+    src/webp/decode.h \
+    src/webp/decode_vp8.h \
     src/webp/encode.h \
     src/webp/mux.h \
+    src/webp/types.h \
 
 OUT_LIBS = src/libwebp.a src/mux/libwebpmux.a
 OUT_EXAMPLES = examples/cwebp examples/dwebp examples/webpmux