diff --git a/src/script_opt/Inline.cc b/src/script_opt/Inline.cc
index 942eefe8b1..4e7b7effa2 100644
--- a/src/script_opt/Inline.cc
+++ b/src/script_opt/Inline.cc
@@ -154,7 +154,7 @@ void Inliner::InlineFunction(FuncInfo* f)
 		f->Func()->SetFrameSize(new_frame_size);
 	}
 
-ExprPtr Inliner::CheckForInlining(IntrusivePtr<CallExpr> c)
+ExprPtr Inliner::CheckForInlining(CallExprPtr c)
 	{
 	auto f = c->Func();
 
diff --git a/src/script_opt/Inline.h b/src/script_opt/Inline.h
index cb27dc3c0f..5c3a64a778 100644
--- a/src/script_opt/Inline.h
+++ b/src/script_opt/Inline.h
@@ -5,6 +5,7 @@
 #pragma once
 
 #include "zeek/Func.h"
+#include "zeek/Expr.h"
 #include "zeek/Scope.h"
 
 #include <unordered_set>
@@ -25,7 +26,7 @@ public:
 
 	// Either returns the original CallExpr if it's not inline-able,
 	// or an InlineExpr if it is.
-	ExprPtr CheckForInlining(IntrusivePtr<CallExpr> c);
+	ExprPtr CheckForInlining(CallExprPtr c);
 
 	// True if the given function has been inlined.
 	bool WasInlined(Func* f)	{ return inline_ables.count(f) > 0; }