diff --git a/CHANGELOG.md b/CHANGELOG.md
index 24ecba43..6f2bb5ee 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 # Changelogs
 
+## Unreleased
+
+* [fixed] Change `RADECSYS` to `RADESYS` for `Aladin#getViewWCS` to follow fits standard deprecation
+
 ## 3.3.3
 
 * [feat] UI: add HiPS basic filter that filters the `hipsList` given
@@ -353,4 +357,4 @@ New in the API:
 ### Fin 2013
 
 * ajout catalogue progressif
-* ajout on select, objectClicked, objectHovered
\ No newline at end of file
+* ajout on select, objectClicked, objectHovered
diff --git a/src/js/Aladin.js b/src/js/Aladin.js
index a66390f6..12f373e3 100644
--- a/src/js/Aladin.js
+++ b/src/js/Aladin.js
@@ -2226,7 +2226,7 @@ aladin.on("positionChanged", ({ra, dec}) => {
         let cooType2 = "LAT--";
 
         // just in case it would be equatorial
-        let radecsys;
+        let radesys;
 
         if (this.getBaseImageLayer().isPlanetaryBody()) {
             const body = this.getBaseImageLayer().hipsBody;
@@ -2240,7 +2240,7 @@ aladin.on("positionChanged", ({ra, dec}) => {
                 case "J2000d":
                     cooType1 = "RA---";
                     cooType2 = "DEC--";
-                    radecsys = "ICRS    ";
+                    radesys = "ICRS    ";
                     break;
                 case "Galactic":
                     cooType1 = "GLON-";
@@ -2266,7 +2266,7 @@ aladin.on("positionChanged", ({ra, dec}) => {
 
         // handle the case of equatorial coordinates that need
         // the radecsys keyword
-        if (radecsys == "ICRS    ") WCS.RADECSYS = radecsys;
+        if (radesys == "ICRS    ") WCS.RADESYS = radesys;
 
         return WCS;
     };