diff --git a/js-api.c b/js-api.c
index c4af0b5..8dbd92f 100644
--- a/js-api.c
+++ b/js-api.c
@@ -44,9 +44,9 @@ void EMSCRIPTEN_KEEPALIVE webdice(char* str){
 	yyparse((void*) scanner, &root);
 	if(root != NULL){
 		result = resolve(root);
-		length = strlen(result.text) + 4 * ceill(log10l(result.max)) + 100;
+		length = strlen(result.text) + 4 * ceill(10 + log10l(result.max)) + 100;
 		out_block = (char*) malloc(length * sizeof(char));
-		sprintf(out_block,"<p>%s = <span title=\"min: %Lf, expected: %Lf, max: %Lf\">%Lf</span></p>", result.text, result.min, result.expected, result.max, result.actual);
+		sprintf(out_block,"<p>%s = <span title=\"min: %Lg, expected: %Lg, max: %Lg\">%Lg</span></p>", result.text, result.min, result.expected, result.max, result.actual);
 
 		output_print(out_block);