diff --git a/pdb-ui/src/main/resources/resources/js/search.js b/pdb-ui/src/main/resources/resources/js/search.js
index 424647f..fec4f78 100644
--- a/pdb-ui/src/main/resources/resources/js/search.js
+++ b/pdb-ui/src/main/resources/resources/js/search.js
@@ -90,6 +90,10 @@ function shiftByInterval(date, directionalFactor)
 			case "minutes":
 				config = { minutes: value };
 				break;
+			case "hour":
+			case "hours":
+				config = { minutes: 60*value };
+				break;
 			case "day":
 			case "days":
 				config = { days: value };