diff --git a/src/installer/Makefile.am.alt b/src/installer/Makefile.am.alt
index 75a9032..ca57b6d 100644
--- a/src/installer/Makefile.am.alt
+++ b/src/installer/Makefile.am.alt
@@ -13,8 +13,7 @@ kiwix_install_SOURCES= \
 	../common/kiwix/library.cpp \
 	../common/kiwix/manager.cpp \
 	../common/regexTools.cpp \
-	../common/pathTools.cpp 
-include_HEADERS= \
+	../common/pathTools.cpp \
 	../common/kiwix/xapian/myhtmlparse.h \
 	../common/kiwix/xapian/namedentities.h \
 	../common/kiwix/xapian/htmlparse.h \
diff --git a/src/manager/Makefile.am.alt b/src/manager/Makefile.am.alt
index b8d5977..3aef434 100644
--- a/src/manager/Makefile.am.alt
+++ b/src/manager/Makefile.am.alt
@@ -8,8 +8,7 @@ kiwix_manage_SOURCES= \
 	../common/base64.cpp \
 	../common/regexTools.cpp \
 	../common/unaccent.cpp \
-	../common/pathTools.cpp 
-include_HEADERS= \
+	../common/pathTools.cpp \
 	../common/kiwix/manager.h \
 	../common/kiwix/library.h \
 	../common/kiwix/reader.h \
diff --git a/src/server/Makefile.am.alt b/src/server/Makefile.am.alt
index db3af8c..000e6e2 100644
--- a/src/server/Makefile.am.alt
+++ b/src/server/Makefile.am.alt
@@ -13,8 +13,7 @@ kiwix_serve_SOURCES= \
 	../common/pathTools.cpp \
 	../common/regexTools.cpp \
 	../common/resourceTools.cpp \
-	../common/stringTools.cpp 
-include_HEADERS= \
+	../common/stringTools.cpp \
 	../common/kiwix/reader.h \
 	../common/kiwix/searcher.h \
 	../common/kiwix/manager.h \