diff --git a/lib/strings/index.q b/lib/strings/index.q
index c61eb43..dc8f542 100644
--- a/lib/strings/index.q
+++ b/lib/strings/index.q
@@ -17,6 +17,7 @@ index(a string, b string) -> (uint, error) {
 				return i - j + 1, 0
 			}
 		} else {
+			i -= j
 			j = 0
 		}
 	}
diff --git a/tests/strings-index.q b/tests/strings-index.q
index d93ac1a..4ace367 100644
--- a/tests/strings-index.q
+++ b/tests/strings-index.q
@@ -25,6 +25,10 @@ main() {
 	assert err == 0
 	assert posLL == 2
 
+	posHello, err := strings.index("HHeHelHellHello", "Hello")
+	assert err == 0
+	assert posHello == 10
+
 	_, err1 := strings.index("Hello", "Hello World")
 	assert err1 != 0