diff --git a/app/src/heart_wave_sample_service.c b/app/src/heart_wave_sample_service.c
index 68fee84..bccc93f 100644
--- a/app/src/heart_wave_sample_service.c
+++ b/app/src/heart_wave_sample_service.c
@@ -130,7 +130,7 @@ uint16_t getRecommendedMagnification() {
   }
   // 3750.0f
   if (max <= (3750 / 2)) {
-    return 15;
+    return 1;
   }
   float af = (3750 / 2) / (max - 3750 / 2);
   if (af > 15) {