diff --git a/base/compiler/ssair/irinterp.jl b/base/compiler/ssair/irinterp.jl
index cfda4e579b12d..5c5b3db170d92 100644
--- a/base/compiler/ssair/irinterp.jl
+++ b/base/compiler/ssair/irinterp.jl
@@ -3,12 +3,12 @@ function codeinst_to_ir(interp::AbstractInterpreter, code::CodeInstance)
     src = code.inferred
     mi = code.def
 
-    isa(src, Union{CodeInfo, Vector{UInt8}}) || return src
-
     if isa(src, Vector{UInt8})
         src = ccall(:jl_uncompress_ir, Any, (Any, Ptr{Cvoid}, Any), mi.def, C_NULL, src::Vector{UInt8})::CodeInfo
     end
 
+    isa(src, CodeInfo) || return src
+
     return inflate_ir(src, mi)
 end