diff --git a/code/__HELPERS/yelling.dm b/code/__HELPERS/yelling.dm
index d4d6e5ac95..6fc9cd7846 100644
--- a/code/__HELPERS/yelling.dm
+++ b/code/__HELPERS/yelling.dm
@@ -125,6 +125,8 @@
 
 #undef RUN_YELL
 #undef DIAGONAL_SUBSTEP
+#undef CALCULATE_DIAGONAL_POWER
+#undef CALCULATE_DIAGONAL_CROSS_POWER
 #undef DIAGONAL_MARK
 #undef CARDINAL_MARK
 
diff --git a/code/datums/explosion2.dm b/code/datums/explosion2.dm
index 75f65e4b23..9a9f2b40cf 100644
--- a/code/datums/explosion2.dm
+++ b/code/datums/explosion2.dm
@@ -372,6 +372,10 @@
 
 #undef WEX_ACT
 
+#undef CALCULATE_DIAGONAL_POWER
+#undef CALCULATE_DIAGONAL_CROSS_POWER
+#undef CARDINAL_MARK_NOCHECK
+
 #undef DIAGONAL_SUBSTEP
 #undef DIAGONAL_MARK
 #undef CARDINAL_MARK