--- a/Makefile.am
+++ b/Makefile.am
@@ -6,7 +6,7 @@
 	  optimize.c morpher.c Triangulate.c \
 	  seamer.c hdrfile.c rgbe.c rgbe.h \
 	  tiff.c ZComb.c jpeg.c png.c  multilayer.c sys_common.c PTcommon.c ColourBrightness.c\
-	  metadata.c jpegicc.c ptstitch.c
+	  metadata.c jpegicc.c ptstitch.c ptfeather.c
 
 if HasJava
 JAVA_SRC = ptpicker.c pteditor.c
@@ -16,7 +16,7 @@
 
 STD_HDR = panorama.h filter.h version.h panotypes.h PTcommon.h pt_stdint.h
 
-INTERNAL_HDR = fftn.h f2c.h ZComb.h adjust.h ColourBrightness.h PTcommon.h pt_stdint.h pttiff.h metadata.h jpegicc.h ptstitch.c
+INTERNAL_HDR = fftn.h f2c.h ZComb.h adjust.h ColourBrightness.h PTcommon.h pt_stdint.h pttiff.h metadata.h jpegicc.h ptstitch.c ptfeather.h
 
 TOOL_HDR = queryfeature.h pteditor.h ptutils.h