diff --git a/plot.c b/plot.c
index 88eb03f..dc2d165 100644
--- a/plot.c
+++ b/plot.c
@@ -2117,12 +2117,16 @@ static void update_waterfall(void){
   int i;
   int w_width = area_width < WIDTH ? area_width : WIDTH;
 //  START_PROFILE;
+#ifdef TINYSA4
 #define WATERFALL_MULTI (SPI_BUFFER_SIZE / WIDTH)
   for (i = CHART_BOTTOM-WATERFALL_MULTI; i>=graph_bottom; i-=WATERFALL_MULTI) {		// Scroll down WATERFALL_MULTI lines at once
     ili9341_read_memory(OFFSETX, i, w_width, WATERFALL_MULTI, spi_buffer);
     ili9341_bulk(OFFSETX, i+1, w_width, WATERFALL_MULTI);
   }
   for (i = CHART_BOTTOM-((CHART_BOTTOM-graph_bottom)/WATERFALL_MULTI)*WATERFALL_MULTI-1; i>=graph_bottom; i--) {  // Scroll down remaining lines
+#else
+    for (i = CHART_BOTTOM-1; i >=graph_bottom; i--) {        // Scroll down
+#endif
     ili9341_read_memory(OFFSETX, i, w_width, 1, spi_buffer);
     ili9341_bulk(OFFSETX, i+1, w_width, 1);
   }