diff --git a/GDI-6ch/firmware/gdi6_gcc_version_check.c b/GDI-6ch/firmware/gdi6_gcc_version_check.c
index 9ce58e7..c7328f2 100644
--- a/GDI-6ch/firmware/gdi6_gcc_version_check.c
+++ b/GDI-6ch/firmware/gdi6_gcc_version_check.c
@@ -7,5 +7,6 @@
 
 // Firmware builds require at least GCC 11.3.1
 #if (GCC_VERSION < 1131)
+// versions 9 and 10 have nasty 'more undefined references to `__cxa_pure_virtual' follow' issue
 	#error "GCC compiler >= 11.3.1 required"
 #endif