diff --git a/Makefile.am b/Makefile.am
index 8749ad2a..0dec4ce2 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -144,8 +144,9 @@ if VSPIPE
 bin_PROGRAMS = vspipe
 
 vspipe_SOURCES = src/vspipe/vspipe.cpp \
-                 src/vspipe/printgraph.cpp \
-                 src/vspipe/md5.c \
+				 src/vspipe/printgraph.cpp \
+				 src/vspipe/md5.c \
+				 src/vspipe/vsjson.cpp \
 				 src/common/wave.cpp
 
 vspipe_LDADD = libvapoursynth-script.la