diff --git a/etc/key_mapping b/etc/key_mapping
index 8de471e06d9c66787d1bdffba6f02eaeee178b85..1098adc6a527de9931baca34912efb2147c33889 100644
--- a/etc/key_mapping
+++ b/etc/key_mapping
@@ -1,6 +1,6 @@
 # CHADO (SO) database key mappings (used for writing out to file)
 #
-# CHADO                 	map     		qualifier (optional)
+# CHADO                 	map to 		    qualifier (optional)
 pseudogenic_transcript      mRNA            pseudo
 pseudogenic_exon            CDS             pseudo
 pseudogene                  gene            pseudo