diff --git a/Makefile b/Makefile
index 32f4d1a3..9eb66070 100644
--- a/Makefile
+++ b/Makefile
@@ -840,7 +840,7 @@ ifeq ($(USE_VOIP),1)
   ifeq ($(USE_INTERNAL_SPEEX),1)
     BASE_CFLAGS += -DFLOATING_POINT -DUSE_ALLOCA -I$(SPEEXDIR)/include
   else
-    CLIENT_LIBS += -lspeex
+    CLIENT_LIBS += -lspeex -lspeexdsp
   endif
 endif