diff --git a/buildSrc/src/main/kotlin/test/server/tests/Cache.kt b/buildSrc/src/main/kotlin/test/server/tests/Cache.kt
index 5a9e22c741f..ae1e2a826bc 100644
--- a/buildSrc/src/main/kotlin/test/server/tests/Cache.kt
+++ b/buildSrc/src/main/kotlin/test/server/tests/Cache.kt
@@ -114,6 +114,10 @@ internal fun Application.cacheTestServer() {
                 call.response.header(HttpHeaders.CacheControl, "max-age=${Long.MAX_VALUE}000")
                 call.respond(HttpStatusCode.OK)
             }
+            get("/invalid-max-age") {
+                call.response.header(HttpHeaders.CacheControl, "max-age: 120")
+                call.respond(HttpStatusCode.OK)
+            }
         }
     }
 }
diff --git a/ktor-client/ktor-client-core/common/src/io/ktor/client/plugins/cache/HttpCacheEntry.kt b/ktor-client/ktor-client-core/common/src/io/ktor/client/plugins/cache/HttpCacheEntry.kt
index 44e5ff38ddd..fc1256a1203 100644
--- a/ktor-client/ktor-client-core/common/src/io/ktor/client/plugins/cache/HttpCacheEntry.kt
+++ b/ktor-client/ktor-client-core/common/src/io/ktor/client/plugins/cache/HttpCacheEntry.kt
@@ -69,7 +69,7 @@ internal fun HttpResponse.cacheExpires(isShared: Boolean, fallback: () -> GMTDat
 
     val maxAge = cacheControl.firstOrNull { it.value.startsWith(maxAgeKey) }
         ?.value?.split("=")
-        ?.get(1)?.toLongOrNull()
+        ?.getOrNull(1)?.toLongOrNull()
 
     if (maxAge != null) {
         return requestTime + maxAge * 1000L
diff --git a/ktor-client/ktor-client-tests/common/test/io/ktor/client/tests/plugins/CacheTest.kt b/ktor-client/ktor-client-tests/common/test/io/ktor/client/tests/plugins/CacheTest.kt
index 8e2bd721ac2..c723daff28f 100644
--- a/ktor-client/ktor-client-tests/common/test/io/ktor/client/tests/plugins/CacheTest.kt
+++ b/ktor-client/ktor-client-tests/common/test/io/ktor/client/tests/plugins/CacheTest.kt
@@ -820,6 +820,21 @@ class CacheTest : ClientLoader() {
         }
     }
 
+    @Test
+    fun testInvalidMaxAge() = clientTests {
+        config {
+            install(HttpCache)
+        }
+
+        test { client ->
+            val url = Url("$TEST_SERVER/cache/invalid-max-age")
+
+            client.get(url).apply {
+                assertEquals(HttpStatusCode.OK, status)
+            }
+        }
+    }
+
     /**
      * Does delay and ensures that the [GMTDate] measurements report at least
      * the specified number of [milliseconds].