diff --git a/src/cmd/go/internal/modload/mvs.go b/src/cmd/go/internal/modload/mvs.go
index 50620e30b69..065a533e1f9 100644
--- a/src/cmd/go/internal/modload/mvs.go
+++ b/src/cmd/go/internal/modload/mvs.go
@@ -148,7 +148,7 @@ func (r *mvsReqs) required(mod module.Version) ([]module.Version, error) {
 	if mpath := f.Module.Mod.Path; mpath != origPath && mpath != mod.Path {
 		return nil, module.VersionError(mod, fmt.Errorf(`parsing go.mod:
 	module declares its path as: %s
-	        but was required as: %s`, mpath, mod.Path))
+	        but was required as: %s`, mpath, origPath))
 	}
 	if f.Go != nil {
 		r.versions.LoadOrStore(mod, f.Go.Version)
diff --git a/src/cmd/go/testdata/mod/example.com_quote_v1.5.2.txt b/src/cmd/go/testdata/mod/example.com_quote_v1.5.2.txt
new file mode 100644
index 00000000000..05f7ae28a39
--- /dev/null
+++ b/src/cmd/go/testdata/mod/example.com_quote_v1.5.2.txt
@@ -0,0 +1,9 @@
+This module is a replacement for rsc.io/quote, but its go.mod file declares
+a module path different from its location and the original module.
+
+-- .mod --
+module rsc.io/Quote
+
+go 1.14
+-- .info --
+{"Version":"v1.5.2"}
diff --git a/src/cmd/go/testdata/script/mod_load_replace_mismatch.txt b/src/cmd/go/testdata/script/mod_load_replace_mismatch.txt
new file mode 100644
index 00000000000..74dbb34b8a7
--- /dev/null
+++ b/src/cmd/go/testdata/script/mod_load_replace_mismatch.txt
@@ -0,0 +1,23 @@
+# If a replacement module declares a module path different from both
+# the original module and its location, report an error with all three paths.
+# In particular, the "required as" path should be the original.
+# Verifies golang.org/issue/38220.
+! go list .
+cmp stderr want
+
+-- go.mod --
+module m
+
+require rsc.io/quote v1.5.2
+
+replace rsc.io/quote v1.5.2 => example.com/quote v1.5.2
+
+-- use.go --
+package use
+
+import _ "rsc.io/quote"
+
+-- want --
+go: example.com/quote@v1.5.2: parsing go.mod:
+	module declares its path as: rsc.io/Quote
+	        but was required as: rsc.io/quote