diff --git a/src/pid.c b/src/pid.c
--- a/src/pid.c
+++ b/src/pid.c
@@ -44,7 +44,7 @@ float pid_process(void)
 		// put ssr output on display
 		ssd1306_drawstring("      ", 0, 90); //fixme: this is bad, but I can't get the old digits to clear otherwise
 		char tempstr[6];
-		itoa(ssr_output, tempstr, 10);
+		snprintf(tempstr, 6, "%g", ssr_output);
 		ssd1306_drawstring(tempstr, 0, 90);
 	}
 	else