diff --git a/src/output.c b/src/output.c
index a651ccb..9261bb1 100644
--- a/src/output.c
+++ b/src/output.c
@@ -726,7 +726,7 @@ static void output_double_color(struct conf_t *state,
  * \param type HTML tag name.
  * \param fl Actual payload of the printout.
  */
-static void output_float(FILE *restrict f, char const *restrict type, float fl)
+static void output_float(FILE *restrict f, char const *restrict type, double fl)
 {
 	fprintf(f, "<%s>%.3f</%s>\n", type, fl, type);
 }