diff --git a/Makefile.am b/Makefile.am
index df1ee2e0d0..8d35068c35 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -251,7 +251,8 @@ libfreeswitch_la_SOURCES = \
 	libs/miniupnpc/upnperrors.c \
 	libs/libnatpmp/natpmp.c \
 	libs/libnatpmp/getgateway.c\
-	libs/spandsp/src/plc.c
+	libs/spandsp/src/plc.c \
+	libs/spandsp/src/bit_operations.c
 
 if ENABLE_CPP
 libfreeswitch_la_SOURCES += src/switch_cpp.cpp