diff --git a/win/configwin.h b/win/configwin.h
index 8cd25353c..99597f5ac 100644
--- a/win/configwin.h
+++ b/win/configwin.h
@@ -25,9 +25,11 @@
 // Resamplers.
 // Only one of each type of resampler (constant or variable rate) should be defined.
 // libsoxr is used for constant-rate resampling.
+// It's currently our only const-rate resampler, so should always be #defined.
 #define USE_LIBSOXR 1
 // Should build only one of libresample or libsamplerate for variable-rate resampling, 
 // but if both are defined, USE_LIBRESAMPLE is used and USE_LIBSAMPLERATE is not.
+// Should always have one or the other #defined.
 #define USE_LIBRESAMPLE 1
 #undef USE_LIBSAMPLERATE