diff --git a/progs/fp/Makefile b/progs/fp/Makefile
index 681928cf260..d77cd32b4df 100755
--- a/progs/fp/Makefile
+++ b/progs/fp/Makefile
@@ -17,6 +17,7 @@ SOURCES = \
 	tri-depth2.c \
 	tri-depthwrite.c \
 	tri-depthwrite2.c \
+	tri-inv.c \
         tri-param.c \
         fp-tri.c