2 files changed, 2 insertions, 1 deletions
diff --git a/blocks.js b/blocks.js
index aac8987..4dc7ccc 100644
--- a/blocks.js
+++ b/blocks.js
@@ -5262,7 +5262,7 @@ CommandSlotMorph.prototype.evaluate = function () {
 };
 
 CommandSlotMorph.prototype.isEmptySlot = function () {
-    return this.nestedBlock() === null;
+    return !this.isStatic && (this.nestedBlock() === null);
 };
 
 // CommandSlotMorph context menu ops
diff --git a/history.txt b/history.txt
index d8e5d8f..abe22be 100755
--- a/history.txt
+++ b/history.txt
@@ -2015,3 +2015,4 @@ ______
 * Localization and Portuguese translation updates, thanks, Manuel!
 * Catalan translation update, thanks, Bernat!!
 * Threads: Text comparisons are now case-sensitive („fixes“ #175)
+* Threads: fixed # 179 - don’t identify primitive (static) C-Slots as implicit formal parameters