diff --git a/cmd/yaegi/extract.go b/cmd/yaegi/extract.go
index 5366551d5..8ca4f834a 100644
--- a/cmd/yaegi/extract.go
+++ b/cmd/yaegi/extract.go
@@ -69,7 +69,7 @@ func extractCmd(arg []string) error {
 		ext.Include = strings.Split(include, ",")
 	}
 
-	r := strings.NewReplacer("/", "-", ".", "_")
+	r := strings.NewReplacer("/", "-", ".", "_", "~", "_")
 
 	for _, pkgIdent := range args {
 		var buf bytes.Buffer
diff --git a/extract/extract.go b/extract/extract.go
index 50fb06337..1bb324d4c 100644
--- a/extract/extract.go
+++ b/extract/extract.go
@@ -132,7 +132,7 @@ func matchList(name string, list []string) (match bool, err error) {
 
 func (e *Extractor) genContent(importPath string, p *types.Package) ([]byte, error) {
 	prefix := "_" + importPath + "_"
-	prefix = strings.NewReplacer("/", "_", "-", "_", ".", "_").Replace(prefix)
+	prefix = strings.NewReplacer("/", "_", "-", "_", ".", "_", "~", "_").Replace(prefix)
 
 	typ := map[string]string{}
 	val := map[string]Val{}