diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7555d8e..84bc0ec 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -10,6 +10,11 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Change default action to `tmux load-buffer -`. This eliminates risk of
   hitting ARG_MAX with `set-buffer`--however unlikely that was.
 
+### Fixed
+- ([#38]): Fix infinite loop when there's a single match.
+
+  ([#38]): https://github.com/abhinav/tmux-fastcopy/issues/38
+
 ## 0.4.0 - 2021-09-06
 Highlight: The minimum required version of Tmux was lowered to 3.0.
 
diff --git a/internal/huffman/huffman.go b/internal/huffman/huffman.go
index ba3e388..e2ed6b4 100644
--- a/internal/huffman/huffman.go
+++ b/internal/huffman/huffman.go
@@ -25,8 +25,13 @@ func Label(alphabetSize int, freqs []int) (labels [][]int) {
 		panic("alphabet must have at least two elements")
 	}
 
-	if len(freqs) == 0 {
+	switch len(freqs) {
+	case 0:
 		return nil
+	case 1:
+		// special-case: If there's only one item, create a single
+		// letter alabel.
+		return [][]int{{0}}
 	}
 
 	// Fill the heap with leaf nodes for the user-provided elements.
diff --git a/internal/huffman/huffman_test.go b/internal/huffman/huffman_test.go
index eeede2c..fe9ccb6 100644
--- a/internal/huffman/huffman_test.go
+++ b/internal/huffman/huffman_test.go
@@ -70,6 +70,15 @@ func TestLabel(t *testing.T) {
 		alphabet *alphabet
 		items    []item
 	}{
+		{
+			alphabet: _ab,
+		},
+		{
+			alphabet: _ab,
+			items: []item{
+				{1, "a"},
+			},
+		},
 		{
 			alphabet: _ab,
 			items: []item{
@@ -149,6 +158,10 @@ func assertLabelInvariants(t *testing.T, numItems int, labels []string) bool {
 	// 2) There must be no duplicates.
 	var seen []string
 	for _, label := range labels {
+		if !assert.NotEmpty(t, label, "label with %d items must not be empty", numItems) {
+			return false
+		}
+
 		if !assert.NotContains(t, seen, label, "duplicate label %q", label) {
 			return false
 		}