diff --git a/collects/tests/typed-scheme/optimizer/generic/inexact-complex-conjugate-top.rkt b/collects/tests/typed-scheme/optimizer/generic/inexact-complex-conjugate-top.rkt
new file mode 100644
index 00000000..3e9b4090
--- /dev/null
+++ b/collects/tests/typed-scheme/optimizer/generic/inexact-complex-conjugate-top.rkt
@@ -0,0 +1,3 @@
+#lang typed/scheme #:optimize
+(require racket/unsafe/ops)
+(conjugate (+ 1.0+2.0i 2.0+4.0i))
diff --git a/collects/typed-scheme/optimizer/inexact-complex.rkt b/collects/typed-scheme/optimizer/inexact-complex.rkt
index a3865450..8c47f7ee 100644
--- a/collects/typed-scheme/optimizer/inexact-complex.rkt
+++ b/collects/typed-scheme/optimizer/inexact-complex.rkt
@@ -139,7 +139,8 @@
            #:with opt
            (begin (log-optimization "unary inexact complex" #'op)
                   #'(op.unsafe n.opt)))
-  (pattern (~and exp (#%plain-app (~var op (float-op binary-inexact-complex-ops))
+  (pattern (~and exp (#%plain-app (~or (~var op (float-op binary-inexact-complex-ops))
+                                       (~and op (~literal conjugate)))
                                   e:inexact-complex-expr ...))
            #:with exp*:unboxed-inexact-complex-opt-expr #'exp
            #:with opt