added mono audio filter

[melted] / src / modules / core / Makefile

diff --git a/src/modules/core/Makefile b/src/modules/core/Makefile
index 1842a82..86d0b44 100644 (file)
--- a/src/modules/core/Makefile
+++ b/src/modules/core/Makefile
@@ -14,6 +14,7 @@ OBJS = factory.o \
           filter_greyscale.o \
           filter_luma.o \
           filter_mirror.o \
+          filter_mono.o \
           filter_obscure.o \
           filter_region.o \
           filter_rescale.o \