diff --git a/src/gallium/auxiliary/Makefile.sources b/src/gallium/auxiliary/Makefile.sources
index 04a779e..faff0b0 100644
--- a/src/gallium/auxiliary/Makefile.sources
+++ b/src/gallium/auxiliary/Makefile.sources
@@ -18,6 +18,7 @@ C_SOURCES := \
 	tgsi/tgsi_ureg.c \
 	tgsi/tgsi_util.c \
 	util/u_debug.c \
+	util/u_debug_describe.c \
 	util/u_format.c \
 	util/u_format_srgb.c \
 	util/u_format_table.c \