diff --git a/wled00/FX.cpp b/wled00/FX.cpp
index ac09fd3b..0d57af3f 100644
--- a/wled00/FX.cpp
+++ b/wled00/FX.cpp
@@ -4488,14 +4488,14 @@ uint16_t mode_flow(void)
   int zoneLen = SEGLEN / zones;
   zones += 2; //add two extra zones to cover beginning and end of segment (compensate integer truncation)
   int offset = ((int)SEGLEN - (zones * zoneLen)) / 2; // center the zones on the segment (can not use bit shift on negative number)
-  //SEGMENT.fill(SEGMENT.color_from_palette(-counter, false, true, 255));
+  SEGMENT.fill(SEGMENT.color_from_palette(-counter, false, true, 255));
 
   for (int z = 0; z < zones; z++)
   {
     int pos = offset + z * zoneLen;
     for (int i = 0; i < zoneLen; i++)
     {
-      unsigned colorIndex = (i * 255 / zoneLen) - counter;
+      uint8_t colorIndex = (i * 255 / zoneLen) - counter;
       int led = (z & 0x01) ? i : (zoneLen -1) -i;
       if (SEGMENT.reverse) led = (zoneLen -1) -led;
       SEGMENT.setPixelColor(pos + led, SEGMENT.color_from_palette(colorIndex, false, true, 255));
diff --git a/wled00/FX.h b/wled00/FX.h
index 3a03e6cc..98a7f7bb 100644
--- a/wled00/FX.h
+++ b/wled00/FX.h
@@ -725,7 +725,7 @@ typedef struct Segment {
     uint8_t get_random_wheel_index(uint8_t pos)  const;
 
     // WLEDMM function moved here (from FX_fcn.cpp) for better optimization by the compiler
-    inline uint32_t __attribute__((hot)) color_from_palette(uint_fast16_t i, bool mapping, bool wrap, uint8_t mcol, uint8_t pbri = 255) const {
+    inline uint32_t __attribute__((hot)) color_from_palette(uint_fast16_t i, bool mapping, bool wrap, uint8_t mcol=0, uint8_t pbri = 255) const {
       uint32_t color = gamma32(currentColor(mcol, colors[mcol]));
       // default palette or no RGB support on segment
       if ((palette == 0 && mcol < NUM_COLORS) || !_isRGB) {