diff --git a/dlib/test/makefile b/dlib/test/makefile
index 80420d701..394aee487 100644
--- a/dlib/test/makefile
+++ b/dlib/test/makefile
@@ -73,6 +73,7 @@ SRC += stack.cpp
 SRC += static_map.cpp
 SRC += static_set.cpp
 SRC += string.cpp
+SRC += svm.cpp
 SRC += threads.cpp
 SRC += timer.cpp
 SRC += tokenizer.cpp