diff --git a/core/misc/throbber-active.svg b/core/misc/throbber-active.svg
index f7959c6ba01..12b0b1c0e84 100644
--- a/core/misc/throbber-active.svg
+++ b/core/misc/throbber-active.svg
@@ -1,4 +1,4 @@
-<svg width="17" height="13" viewBox="0 0 170 130">
+<svg xmlns="http://www.w3.org/2000/svg" width="17" height="13" viewBox="0 0 170 130">
   <g stroke="#0b73be" stroke-width="20" stroke-linecap="round" fill="none">
     <circle cx="85" cy="65" r="48" />
     <line x1="85" y1="65" x2="85" y2="17" />
diff --git a/core/misc/throbber-inactive.svg b/core/misc/throbber-inactive.svg
index ea3d5b63b4d..6a376e3e648 100644
--- a/core/misc/throbber-inactive.svg
+++ b/core/misc/throbber-inactive.svg
@@ -1,3 +1,3 @@
-<svg width="17" height="13" viewBox="0 0 170 130">
+<svg xmlns="http://www.w3.org/2000/svg" width="17" height="13" viewBox="0 0 170 130">
   <circle stroke="#bcbcbc" stroke-width="20" fill="none" cx="85" cy="65" r="48" />
 </svg>