diff --git a/src/cmd/compile/internal/importer/iimport.go b/src/cmd/compile/internal/importer/iimport.go
index 440f557a80d..82aff183354 100644
--- a/src/cmd/compile/internal/importer/iimport.go
+++ b/src/cmd/compile/internal/importer/iimport.go
@@ -233,10 +233,7 @@ func (p *iimporter) doDecl(pkg *types2.Package, name string) {
 	}
 
 	r := &importReader{p: p, currPkg: pkg}
-	// Reader.Reset is not available in Go 1.4.
-	// Use bytes.NewReader for now.
-	// r.declReader.Reset(p.declData[off:])
-	r.declReader = *strings.NewReader(p.declData[off:])
+	r.declReader.Reset(p.declData[off:])
 
 	r.obj(name)
 }
@@ -282,10 +279,7 @@ func (p *iimporter) typAt(off uint64, base *types2.Named) types2.Type {
 	}
 
 	r := &importReader{p: p}
-	// Reader.Reset is not available in Go 1.4.
-	// Use bytes.NewReader for now.
-	// r.declReader.Reset(p.declData[off-predeclReserved:])
-	r.declReader = *strings.NewReader(p.declData[off-predeclReserved:])
+	r.declReader.Reset(p.declData[off-predeclReserved:])
 	t := r.doType(base)
 
 	if canReuse(base, t) {
diff --git a/src/cmd/compile/internal/typecheck/iimport.go b/src/cmd/compile/internal/typecheck/iimport.go
index a08f62b4146..80ae0259e86 100644
--- a/src/cmd/compile/internal/typecheck/iimport.go
+++ b/src/cmd/compile/internal/typecheck/iimport.go
@@ -280,9 +280,7 @@ func (p *iimporter) newReader(off uint64, pkg *types.Pkg) *importReader {
 		p:       p,
 		currPkg: pkg,
 	}
-	// (*strings.Reader).Reset wasn't added until Go 1.7, and we
-	// need to build with Go 1.4.
-	r.Reader = *strings.NewReader(p.declData[off:])
+	r.Reader.Reset(p.declData[off:])
 	return r
 }