diff --git a/vignettes/datasets.Rmd b/vignettes/datasets.Rmd
index 9f12bbd80..e7ee87ab0 100644
--- a/vignettes/datasets.Rmd
+++ b/vignettes/datasets.Rmd
@@ -173,7 +173,7 @@ This data set contains all EARS-Net and ATC codes gathered from WHO and WHONET,
 * [ATC/DDD index from WHO Collaborating Centre for Drug Statistics Methodology](https://www.whocc.no/atc_ddd_index/) (note: this may not be used for commercial purposes, but is freely available from the WHO CC website for personal use)
 * [PubChem by the US National Library of Medicine](https://pubchem.ncbi.nlm.nih.gov)
 * [WHONET software 2019](https://whonet.org)
-* [LOINC (Logical Observation Identifiers Names and Codes](https://loinc.org)
+* [LOINC (Logical Observation Identifiers Names and Codes)](https://loinc.org)
 
 ### Example content
 
@@ -200,7 +200,7 @@ This data set contains all ATC codes gathered from WHO and all compound IDs from
 
 * [ATC/DDD index from WHO Collaborating Centre for Drug Statistics Methodology](https://www.whocc.no/atc_ddd_index/) (note: this may not be used for commercial purposes, but is freely available from the WHO CC website for personal use)
 * [PubChem by the US National Library of Medicine](https://pubchem.ncbi.nlm.nih.gov)
-* [LOINC (Logical Observation Identifiers Names and Codes](https://loinc.org)
+* [LOINC (Logical Observation Identifiers Names and Codes)](https://loinc.org)
 
 ### Example content