diff --git a/dlib/svm.h b/dlib/svm.h
index 4f00f7329..e7f50f12c 100644
--- a/dlib/svm.h
+++ b/dlib/svm.h
@@ -22,6 +22,7 @@
 #include "svm/kernel_matrix.h"
 #include "svm/empirical_kernel_map.h"
 #include "svm/svm_c_linear_trainer.h"
+#include "svm/svm_c_linear_dcd_trainer.h"
 #include "svm/svm_c_ekm_trainer.h"
 #include "svm/simplify_linear_decision_function.h"
 #include "svm/krr_trainer.h"