diff --git a/libavcodec/Makefile b/libavcodec/Makefile
index 4e6f5a1af3..36d6618fbe 100644
--- a/libavcodec/Makefile
+++ b/libavcodec/Makefile
@@ -345,7 +345,8 @@ OBJS-$(CONFIG_WMAV2_DECODER)           += wmadec.o wma.o
 OBJS-$(CONFIG_WMAV2_ENCODER)           += wmaenc.o wma.o
 OBJS-$(CONFIG_WMAVOICE_DECODER)        += wmavoice.o \
                                           celp_math.o celp_filters.o \
-                                          acelp_vectors.o acelp_filters.o
+                                          acelp_vectors.o acelp_filters.o \
+                                          lsp.o
 OBJS-$(CONFIG_WMV2_DECODER)            += wmv2dec.o wmv2.o        \
                                           msmpeg4.o msmpeg4data.o \
                                           intrax8.o intrax8dsp.o