diff --git a/docs/lcb/notes/21507.md b/docs/lcb/notes/21507.md
new file mode 100644
index 00000000000..5e6dc61164d
--- /dev/null
+++ b/docs/lcb/notes/21507.md
@@ -0,0 +1 @@
+# [21507] Fix incorrect parameter order in com.livecode.math atan2 function
diff --git a/libscript/src/math.lcb b/libscript/src/math.lcb
index deb3c787a7a..0774cffc2bd 100644
--- a/libscript/src/math.lcb
+++ b/libscript/src/math.lcb
@@ -322,7 +322,7 @@ end syntax
 public handler atan2(in pY as Number, in pX as Number) returns Number
     variable tVar as Number
     unsafe
-        MCMathEvalAtan2Number(pX, pY, tVar)
+        MCMathEvalAtan2Number(pY, pX, tVar)
     end unsafe
     return tVar
 end handler