diff --git a/JuliaSyntax/src/integration/expr.jl b/JuliaSyntax/src/integration/expr.jl
index 0783ee3f04e5c..fd7c93dfda3f9 100644
--- a/JuliaSyntax/src/integration/expr.jl
+++ b/JuliaSyntax/src/integration/expr.jl
@@ -528,8 +528,9 @@ end
     elseif k == K"function"
         if length(args) > 1
             if has_flags(nodehead, SHORT_FORM_FUNCTION_FLAG)
+                a1 = args[1]
                 a2 = args[2]
-                if !@isexpr(a2, :block)
+                if !@isexpr(a2, :block) && !@isexpr(a1, Symbol("'"))
                     args[2] = Expr(:block, a2)
                 end
                 retexpr.head = :(=)
diff --git a/JuliaSyntax/test/expr.jl b/JuliaSyntax/test/expr.jl
index d7547848bef09..828d0a92e8b89 100644
--- a/JuliaSyntax/test/expr.jl
+++ b/JuliaSyntax/test/expr.jl
@@ -269,6 +269,12 @@
                  Expr(:block,
                       LineNumberNode(3)))
 
+        # short-form postfix function shouldn't introduce a block
+        @test parsestmt("x' = 1") ==
+            Expr(:(=),
+                 Expr(Symbol("'"), :x),
+                 1)
+
         # `.=` doesn't introduce short form functions
         @test parsestmt("f() .= xs") ==
             Expr(:(.=), Expr(:call, :f), :xs)