diff --git a/internal/fnmatch/fnmatch.go b/internal/fnmatch/fnmatch.go
index 74a12754e..80ffad795 100644
--- a/internal/fnmatch/fnmatch.go
+++ b/internal/fnmatch/fnmatch.go
@@ -54,17 +54,22 @@ func Convert(pattern string, flags int) (*regexp.Regexp, error) {
 		pattern = strings.Replace(pattern, "\\?", "[:escapedques:]", -1)
 		pattern = strings.Replace(pattern, "\\.", "[:escapeddot:]", -1)
 	}
-	pattern = strings.Replace(pattern, ".", "\\.", -1)
-	pattern = strings.Replace(pattern, "+", "\\+", -1)
-	pattern = strings.Replace(pattern, "$", "\\$", -1)
-	pattern = strings.Replace(pattern, "^", "\\^", -1)
+
+	// Characters that are special in regexps but not in glob, must be
+	// escaped.
+	for _, char := range []string{".", "+", "$", "^", "(", ")", "|"} {
+		pattern = strings.Replace(pattern, char, "\\"+char, -1)
+	}
+
 	pattern = strings.Replace(pattern, "**", "[:doublestar:]", -1)
 	pattern = strings.Replace(pattern, "*", any+"*", -1)
 	pattern = strings.Replace(pattern, "[:doublestar:]", ".*", -1)
 	pattern = strings.Replace(pattern, "?", any, -1)
+
 	pattern = strings.Replace(pattern, "[:escapedstar:]", "\\*", -1)
 	pattern = strings.Replace(pattern, "[:escapedques:]", "\\?", -1)
 	pattern = strings.Replace(pattern, "[:escapeddot:]", "\\.", -1)
+
 	pattern = "^" + pattern + "$"
 	if flags&FNM_CASEFOLD != 0 {
 		pattern = "(?i)" + pattern
diff --git a/internal/fnmatch/fnmatch_test.go b/internal/fnmatch/fnmatch_test.go
index f12c98591..90b5d52c2 100644
--- a/internal/fnmatch/fnmatch_test.go
+++ b/internal/fnmatch/fnmatch_test.go
@@ -68,6 +68,10 @@ var testcases = []testcase{
 	{"hey^hello", "hey^hello", 0, true},
 	{"hey{hello", "hey{hello", 0, true},
 	{"hey}hello", "hey}hello", 0, true},
+	{"hey(hello", "hey(hello", 0, true},
+	{"hey)hello", "hey)hello", 0, true},
+	{"hey|hello", "hey|hello", 0, true},
+	{"hey|hello", "hey|other", 0, false},
 }
 
 func TestMatch(t *testing.T) {