diff --git a/src/basic/math_consts/e309.const_DOUBLE_PI.s b/src/basic/math_consts/e309.const_DOUBLE_PI.s
deleted file mode 100644
index 50c149ca..00000000
--- a/src/basic/math_consts/e309.const_DOUBLE_PI.s
+++ /dev/null
@@ -1,10 +0,0 @@
-;; #LAYOUT# STD *       #TAKE
-;; #LAYOUT# *   BASIC_0 #TAKE
-;; #LAYOUT# *   *       #IGNORE
-
-;
-; Math package - a constant, for documentation see:
-; - https://sourceforge.net/p/acme-crossass/code-0/38/tree/trunk/ACME_Lib/cbm/c64/float.a?force=True
-;
-
-	+PUT_CONST_DOUBLE_PI               ; duplicated constant - no label
diff --git a/src/basic/math_consts/e309.interop b/src/basic/math_consts/e309.interop
deleted file mode 100644
index cdf8d0e7..00000000
--- a/src/basic/math_consts/e309.interop
+++ /dev/null
@@ -1 +0,0 @@
-A well-known floating-point constant, has to be at the same place or we risk hard to debug improper calculation results.