diff --git a/FlagsmithClient/src/main/java/com/flagsmith/Flagsmith.kt b/FlagsmithClient/src/main/java/com/flagsmith/Flagsmith.kt
index 6101f27..7a38439 100644
--- a/FlagsmithClient/src/main/java/com/flagsmith/Flagsmith.kt
+++ b/FlagsmithClient/src/main/java/com/flagsmith/Flagsmith.kt
@@ -182,7 +182,7 @@ class Flagsmith constructor(
     }
 
     fun getIdentity(identity: String, transient: Boolean = false, result: (Result<IdentityFlagsAndTraits>) -> Unit) =
-        retrofit.getIdentityFlagsAndTraits(identity, transient).enqueueWithResult(defaults = null, result = result)
+        retrofit.getIdentityFlagsAndTraits(identity, if (transient) true else null).enqueueWithResult(defaults = null, result = result)
             .also { lastUsedIdentity = identity }
 
     fun clearCache() {
diff --git a/FlagsmithClient/src/main/java/com/flagsmith/internal/FlagsmithRetrofitService.kt b/FlagsmithClient/src/main/java/com/flagsmith/internal/FlagsmithRetrofitService.kt
index 9753b0a..60e9eab 100644
--- a/FlagsmithClient/src/main/java/com/flagsmith/internal/FlagsmithRetrofitService.kt
+++ b/FlagsmithClient/src/main/java/com/flagsmith/internal/FlagsmithRetrofitService.kt
@@ -23,7 +23,7 @@ import com.google.gson.GsonBuilder
 interface FlagsmithRetrofitService {
 
     @GET("identities/")
-    fun getIdentityFlagsAndTraits(@Query("identifier") identity: String, @Query("transient") transient: Boolean = false) : Call<IdentityFlagsAndTraits>
+    fun getIdentityFlagsAndTraits(@Query("identifier") identity: String, @Query("transient") transient: Boolean? = null) : Call<IdentityFlagsAndTraits>
 
     @GET("flags/")
     fun getFlags() : Call<List<Flag>>
diff --git a/FlagsmithClient/src/test/java/com/flagsmith/IdentityTests.kt b/FlagsmithClient/src/test/java/com/flagsmith/IdentityTests.kt
index 7a6c9c4..dedacdd 100644
--- a/FlagsmithClient/src/test/java/com/flagsmith/IdentityTests.kt
+++ b/FlagsmithClient/src/test/java/com/flagsmith/IdentityTests.kt
@@ -58,6 +58,38 @@ class IdentityTests {
         }
     }
 
+    @Test(expected = AssertionError::class)
+    fun testGetIdentityWithExpectedParameterMissing() {
+        mockServer.mockResponseFor(MockEndpoint.GET_IDENTITIES)
+        runBlocking {
+            flagsmith.getIdentitySync("person")
+
+            mockServer.verify(
+                request()
+                    .withPath("/identities/")
+                    .withMethod("GET")
+                    .withQueryStringParameter("transient")
+            )
+        }
+    }
+
+    @Test
+    fun testGetIdentityWithoutTransientParameter() {
+        mockServer.mockResponseFor(MockEndpoint.GET_IDENTITIES)
+        runBlocking {
+            flagsmith.getIdentitySync("person")
+            val requests = mockServer.retrieveRecordedRequests(
+                request()
+                    .withPath("/identities/")
+                    .withMethod("GET")
+            )
+            assertEquals(1, requests.size)
+            val request = requests[0]
+            val transientParam = request.queryStringParameterList.find { it.name.toString() == "transient" }
+            assertNull("transient parameter should not be present", transientParam)
+        }
+    }
+
     @Test
     fun testGetTransientIdentity() {
         mockServer.mockResponseFor(MockEndpoint.GET_TRANSIENT_IDENTITIES)