diff --git a/FirebasePerformance/Sources/Instrumentation/Network/FPRNSURLSessionInstrument.m b/FirebasePerformance/Sources/Instrumentation/Network/FPRNSURLSessionInstrument.m
index 32b2efc2f02..123d3cdb3e9 100644
--- a/FirebasePerformance/Sources/Instrumentation/Network/FPRNSURLSessionInstrument.m
+++ b/FirebasePerformance/Sources/Instrumentation/Network/FPRNSURLSessionInstrument.m
@@ -453,7 +453,13 @@ void InstrumentUploadTaskWithRequestFromDataCompletionHandler(FPRNSURLSessionIns
     }
     typedef NSURLSessionUploadTask *(*OriginalImp)(id, SEL, NSURLRequest *, NSData *,
                                                    FPRDataTaskCompletionHandler);
-    return ((OriginalImp)currentIMP)(session, selector, request, bodyData,
+    // To avoid a runtime warning in Xcode 15, the given `URLRequest`
+    // should have a nil `HTTPBody`. To workaround this, the `HTTPBody` data is removed
+    // and requestData is replaced with it, if it bodyData was `nil`.
+    NSMutableURLRequest *requestWithoutHTTPBody = [request mutableCopy];
+    NSData *requestData = bodyData ?: requestWithoutHTTPBody.HTTPBody;
+    requestWithoutHTTPBody.HTTPBody = nil;
+    return ((OriginalImp)currentIMP)(session, selector, requestWithoutHTTPBody, requestData,
                                      wrappedCompletionHandler);
   }];
 }