diff --git a/src/gprs_coding_scheme.h b/src/gprs_coding_scheme.h
index 728ffd6..d5604fb 100644
--- a/src/gprs_coding_scheme.h
+++ b/src/gprs_coding_scheme.h
@@ -82,6 +82,7 @@
 	enum CodingScheme m_scheme;
 };
 
+// FIXME: remove once < comparison operator below is no longer necessary
 inline uint8_t GprsCodingScheme::to_num() const
 {
 	if (mcs_is_gprs(m_scheme))