diff --git a/src/include/ngspice/Makefile.am b/src/include/ngspice/Makefile.am
index f6135dba1..5b6af544c 100644
--- a/src/include/ngspice/Makefile.am
+++ b/src/include/ngspice/Makefile.am
@@ -126,6 +126,7 @@ pkginclude_HEADERS = \
 	FastNorm3.h	\
 	fftext.h	\
 	wallace.h	\
+	wincolornames.h	\
 	wstdio.h
 
 MAINTAINERCLEANFILES = Makefile.in