diff --git a/pkg/comp/comp.go b/pkg/comp/comp.go
index 445ee53d..9531479b 100644
--- a/pkg/comp/comp.go
+++ b/pkg/comp/comp.go
@@ -319,7 +319,7 @@ func computeCompExtension(compPrefix string, crtn *CompReturn) (string, bool) {
 	if lcp == compPrefix || len(lcp) < len(compPrefix) || !strings.HasPrefix(lcp, compPrefix) {
 		return "", false
 	}
-	return lcp[len(compPrefix):], utilfn.ContainsStr(compStrs, lcp)
+	return lcp[len(compPrefix):], (utilfn.ContainsStr(compStrs, lcp) && !utilfn.IsPrefix(compStrs, lcp))
 }
 
 func (p *CompPoint) FullyExtend(crtn *CompReturn) utilfn.StrWithPos {
diff --git a/pkg/utilfn/utilfn.go b/pkg/utilfn/utilfn.go
index 752684d9..e5b245f2 100644
--- a/pkg/utilfn/utilfn.go
+++ b/pkg/utilfn/utilfn.go
@@ -120,6 +120,15 @@ func ContainsStr(strs []string, test string) bool {
 	return false
 }
 
+func IsPrefix(strs []string, test string) bool {
+	for _, s := range strs {
+		if len(s) > len(test) && strings.HasPrefix(s, test) {
+			return true
+		}
+	}
+	return false
+}
+
 type StrWithPos struct {
 	Str string
 	Pos int // this is a 'rune' position (not a byte position)