diff --git a/unit_tests/logicdata.cpp b/unit_tests/logicdata.cpp
index b2da4a2d85..2d45de932a 100644
--- a/unit_tests/logicdata.cpp
+++ b/unit_tests/logicdata.cpp
@@ -32,6 +32,7 @@
 
 #define SIGN_FLAG 0x80000000L
 
+// todo: numChannels 7 or numChannels 8 does not work? :(
 #define numChannels 6
 #define reservedDurationInSamples 10