diff --git a/CHANGELOG.md b/CHANGELOG.md
index 39983948..efbe90a5 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 ### Builds after release 0.13.1
 
+#### Build 2203191
+
+-   Fixed sunrise/set calculation (once again)
+
 #### Build 2203190
 
 -   Fixed `/json/cfg` unable to set busses (#2589)
diff --git a/wled00/wled.h b/wled00/wled.h
index db0593f9..11866f04 100644
--- a/wled00/wled.h
+++ b/wled00/wled.h
@@ -8,7 +8,7 @@
  */
 
 // version code in format yymmddb (b = daily build)
-#define VERSION 2203190
+#define VERSION 2203191
 
 //uncomment this if you have a "my_config.h" file you'd like to use
 //#define WLED_USE_MY_CONFIG
diff --git a/wled00/wled_math.h b/wled00/wled_math.h
index bfaff06a..acdf3caa 100644
--- a/wled00/wled_math.h
+++ b/wled00/wled_math.h
@@ -18,6 +18,7 @@
 float cos_t(float phi)
 {
   float x = modd(phi, TWO_PI);
+  if (x < 0) x = -1 * x;
   int8_t sign = 1;
   if (x > PI)
   {