diff --git a/src/st/st-icon-theme.c b/src/st/st-icon-theme.c
index d6f68afbb..9edde5c77 100644
--- a/src/st/st-icon-theme.c
+++ b/src/st/st-icon-theme.c
@@ -3802,7 +3802,7 @@ st_icon_info_load_symbolic_svg (StIconInfo    *icon_info,
   double alpha;
   char alphastr[G_ASCII_DTOSTR_BUF_SIZE];
 
-  alpha = colors->foreground.alpha;
+  alpha = colors->foreground.alpha / 255.;
 
   css_fg = color_to_string_noalpha (&colors->foreground);