diff --git a/rules/decompression-bomb.go b/rules/decompression-bomb.go
index bfc5897..02256fa 100644
--- a/rules/decompression-bomb.go
+++ b/rules/decompression-bomb.go
@@ -95,6 +95,7 @@ func NewDecompressionBombCheck(id string, conf gosec.Config) (gosec.Rule, []ast.
 
 	copyCalls := gosec.NewCallList()
 	copyCalls.Add("io", "Copy")
+	copyCalls.Add("io", "CopyBuffer")
 
 	return &decompressionBombCheck{
 		MetaData: gosec.MetaData{
diff --git a/testutils/source.go b/testutils/source.go
index 20c0b20..ee69766 100644
--- a/testutils/source.go
+++ b/testutils/source.go
@@ -699,12 +699,40 @@ func main() {
 	if err != nil {
 		panic(err)
 	}
-	io.Copy(os.Stdout, r)
+	_, err := io.Copy(os.Stdout, r)
+	if err != nil {
+		panic(err)
+	}
 
 	r.Close()
 }`}, 1, gosec.NewConfig()}, {[]string{`
 package main
 
+import (
+	"bytes"
+	"compress/zlib"
+	"io"
+	"os"
+)
+
+func main() {
+	buff := []byte{120, 156, 202, 72, 205, 201, 201, 215, 81, 40, 207,
+		47, 202, 73, 225, 2, 4, 0, 0, 255, 255, 33, 231, 4, 147}
+	b := bytes.NewReader(buff)
+
+	r, err := zlib.NewReader(b)
+	if err != nil {
+		panic(err)
+	}
+	buf := make([]byte, 8)
+	_, err := io.CopyBuffer(os.Stdout, r, buf)
+	if err != nil {
+		panic(err)
+	}
+	r.Close()
+}`}, 1, gosec.NewConfig()}, {[]string{`
+package main
+
 import (
 	"archive/zip"
 	"io"