diff --git a/src/dec/Makefile.am b/src/dec/Makefile.am
index 61c0211a..3f66fcff 100644
--- a/src/dec/Makefile.am
+++ b/src/dec/Makefile.am
@@ -8,6 +8,4 @@ libwebpdecode_la_CPPFLAGS = $(USE_EXPERIMENTAL_CODE)
 libwebpdecodeinclude_HEADERS = ../webp/decode.h ../webp/decode_vp8.h ../webp/types.h
 libwebpdecodeincludedir = $(includedir)/webp
 
-noinst_HEADERS = vp8i.h webpi.h
-
 noinst_LTLIBRARIES = libwebpdecode.la
diff --git a/src/dsp/Makefile.am b/src/dsp/Makefile.am
index 5449bede..90ea96af 100644
--- a/src/dsp/Makefile.am
+++ b/src/dsp/Makefile.am
@@ -10,5 +10,4 @@ libwebpdsp_la_CPPFLAGS = $(USE_EXPERIMENTAL_CODE)
 libwebpdspinclude_HEADERS = ../webp/types.h
 libwebpdspincludedir = $(includedir)/webp
 
-noinst_HEADERS = dsp.h yuv.h
 noinst_LTLIBRARIES = libwebpdsp.la
diff --git a/src/enc/Makefile.am b/src/enc/Makefile.am
index 27089c02..1e60c2bf 100644
--- a/src/enc/Makefile.am
+++ b/src/enc/Makefile.am
@@ -9,5 +9,4 @@ libwebpencode_la_CPPFLAGS = $(USE_EXPERIMENTAL_CODE)
 libwebpencodeinclude_HEADERS = ../webp/encode.h ../webp/types.h
 libwebpencodeincludedir = $(includedir)/webp
 
-noinst_HEADERS = cost.h vp8enci.h
 noinst_LTLIBRARIES = libwebpencode.la
diff --git a/src/utils/Makefile.am b/src/utils/Makefile.am
index 81a6797a..bb35c633 100644
--- a/src/utils/Makefile.am
+++ b/src/utils/Makefile.am
@@ -8,6 +8,4 @@ libwebputils_la_CPPFLAGS = $(USE_EXPERIMENTAL_CODE)
 libwebputilsinclude_HEADERS = ../webp/types.h
 libwebputilsincludedir = $(includedir)/webp
 
-noinst_HEADERS = bit_reader.h bit_writer.h thread.h
-
 noinst_LTLIBRARIES = libwebputils.la