diff --git a/compiler/sem.nim b/compiler/sem.nim
index 4b0f39c875..572993d310 100644
--- a/compiler/sem.nim
+++ b/compiler/sem.nim
@@ -88,6 +88,11 @@ proc fitNodePostMatch(c: PContext, formal: PType, arg: PNode): PNode =
     changeType(c, x, formal, check=true)
   result = arg
   result = skipHiddenSubConv(result, c.graph, c.idgen)
+  # mark inserted converter as used:
+  var a = result
+  if a.kind == nkHiddenDeref: a = a[0]
+  if a.kind == nkHiddenCallConv and a[0].kind == nkSym:
+    markUsed(c, a.info, a[0].sym)
 
 
 proc fitNode(c: PContext, formal: PType, arg: PNode; info: TLineInfo): PNode =
diff --git a/compiler/semcall.nim b/compiler/semcall.nim
index 7b34cab086..d96cceaca0 100644
--- a/compiler/semcall.nim
+++ b/compiler/semcall.nim
@@ -556,6 +556,15 @@ proc instGenericConvertersSons*(c: PContext, n: PNode, x: TCandidate) =
     for i in 1..<n.len:
       instGenericConvertersArg(c, n[i], x)
 
+proc markConvertersUsed*(c: PContext, n: PNode) =
+  assert n.kind in nkCallKinds
+  for i in 1..<n.len:
+    var a = n[i]
+    if a == nil: continue
+    if a.kind == nkHiddenDeref: a = a[0]
+    if a.kind == nkHiddenCallConv and a[0].kind == nkSym:
+      markUsed(c, a.info, a[0].sym)
+
 proc indexTypesMatch(c: PContext, f, a: PType, arg: PNode): PNode =
   var m = newCandidate(c, f)
   result = paramTypesMatch(m, f, a, arg, nil)
@@ -651,6 +660,7 @@ proc semResolvedCall(c: PContext, x: TCandidate,
 
   result = x.call
   instGenericConvertersSons(c, result, x)
+  markConvertersUsed(c, result)
   result[0] = newSymNode(finalCallee, getCallLineInfo(result[0]))
   result.typ = finalCallee.typ[0]
   updateDefaultParams(result)
diff --git a/compiler/semexprs.nim b/compiler/semexprs.nim
index 3b081b827e..c31b6819d7 100644
--- a/compiler/semexprs.nim
+++ b/compiler/semexprs.nim
@@ -1205,6 +1205,7 @@ proc semIndirectOp(c: PContext, n: PNode, flags: TExprFlags; expectedType: PType
     else:
       result = m.call
       instGenericConvertersSons(c, result, m)
+      markConvertersUsed(c, result)
 
   else:
     result = overloadedCallOpr(c, n) # this uses efNoUndeclared
diff --git a/compiler/sigmatch.nim b/compiler/sigmatch.nim
index e703a23cd5..970522a338 100644
--- a/compiler/sigmatch.nim
+++ b/compiler/sigmatch.nim
@@ -2095,7 +2095,9 @@ proc userConvMatch(c: PContext, m: var TCandidate, f, a: PType,
       dest = generateTypeInstance(c, m.bindings, arg, dest)
     let fdest = typeRel(m, f, dest)
     if fdest in {isEqual, isGeneric} and not (dest.kind == tyLent and f.kind in {tyVar}):
-      markUsed(c, arg.info, c.converters[i])
+      # can't fully mark used yet, may not be used in final call
+      incl(c.converters[i].flags, sfUsed)
+      markOwnerModuleAsUsed(c, c.converters[i])
       var s = newSymNode(c.converters[i])
       s.typ = c.converters[i].typ
       s.info = arg.info
diff --git a/tests/converter/tdeprecatedconverter.nim b/tests/converter/tdeprecatedconverter.nim
new file mode 100644
index 0000000000..a7ae6fe011
--- /dev/null
+++ b/tests/converter/tdeprecatedconverter.nim
@@ -0,0 +1,14 @@
+# issue #24241
+
+{.warningAsError[Deprecated]: on.}
+
+type X = distinct int
+
+converter toInt(x: X): int{.deprecated.} = int(x)
+
+template `==`(a, b: X): bool = false # this gets called so we didn't convert
+
+doAssert not (X(1) == X(2))
+doAssert not compiles(X(1) + X(2))
+doAssert not (compiles do:
+  let x: int = X(1))