diff --git a/modules/ml/src/svm.cpp b/modules/ml/src/svm.cpp
index 0d62f7858a..3bc01ba8ad 100644
--- a/modules/ml/src/svm.cpp
+++ b/modules/ml/src/svm.cpp
@@ -41,10 +41,12 @@
 //M*/
 
 #include "precomp.hpp"
+#include <opencv2/core/utils/logger.hpp>
 
 #include <stdarg.h>
 #include <ctype.h>
 
+
 /****************************************************************************************\
                                 COPYRIGHT NOTICE
                                 ----------------
@@ -1458,9 +1460,10 @@ public:
                     for( j = i+1; j< class_count; j++ )
                     {
                         int cj = class_ranges[j+1] - class_ranges[j];
-                        if( nu*(ci + cj)*0.5 > std::min( ci, cj ) )
-                            // TODO: add some diagnostic
+                        if( nu*(ci + cj)*0.5 > std::min( ci, cj ) ) {
+                            CV_LOG_ERROR(NULL, "Training cases incompatible with nu parameter—try a lower value.");
                             return false;
+                        }
                     }
                 }
             }