diff --git a/src/gene_biotype_mappings.json b/src/gene_biotype_mappings.json
index 97f4616..209786e 100644
--- a/src/gene_biotype_mappings.json
+++ b/src/gene_biotype_mappings.json
@@ -23,7 +23,7 @@
     "srp_mrna":             "mRNA",
     "srp_rn7sl":            "srpRNA",
     "srp_rn7sl_pseudogene": "srpRNA",
-    "Mt_tRNA": "Other small RNAs",
+    "Mt_tRNA": "MT tRNA",
     "Mt_rRNA": "MT rRNA",
     "rRNA_pseudogene": "Pseudogene",
     "rRNA":            "rRNA",      
@@ -55,9 +55,10 @@
     "lncRNA": ["lncRNA"],
     "snRNA/snoRNA": ["snRNA", "snoRNA"],
     "miRNA": ["miRNA"],
-    "Other small RNAs": ["scaRNA", "sRNA", "scRNA", "vault_RNA", "Mt_tRNA"],
+    "Other small RNAs": ["scaRNA", "sRNA", "scRNA", "vault_RNA"],
     "miscRNA": ["misc_RNA"],
     "srpRNA":  ["srp_rn7sl", "srp_rn7sl_pseudogene"],
+    "MT tRNA": ["Mt_tRNA"],
     "MT rRNA": ["Mt_rRNA"],
     "rRNA": ["rRNA"],
     "Spike-in RNA": ["ercc_spike_in", "sirv_spike_in"],