diff --git a/ios/IAPManager.mm b/ios/IAPManager.mm
index e48a6025e0..a3b0e587bc 100644
--- a/ios/IAPManager.mm
+++ b/ios/IAPManager.mm
@@ -134,15 +134,20 @@
 				// Perform the unlock (updaing the variable and switching the icon).
 				[self unlockGold];
 				[[SKPaymentQueue defaultQueue] finishTransaction:transaction];
-				g_requestManager.PostSystemSuccess(_pendingRequestID, "", 0);
-				_pendingRequestID = 0;
+				// The queue also delivers transactions we didn't ask for, like unfinished ones at startup.
+				if (_pendingRequestID != 0) {
+					g_requestManager.PostSystemSuccess(_pendingRequestID, "", 0);
+					_pendingRequestID = 0;
+				}
 				break;
 			case SKPaymentTransactionStateFailed:
 				NSLog(@"[IAPManager] Purchase failed (requestID: %d): %@", _pendingRequestID, transaction.error.localizedDescription);
 				[[SKPaymentQueue defaultQueue] finishTransaction:transaction];
 				// Optionally post failure callback here
-				g_requestManager.PostSystemFailure(_pendingRequestID);
-				_pendingRequestID = 0;
+				if (_pendingRequestID != 0) {
+					g_requestManager.PostSystemFailure(_pendingRequestID);
+					_pendingRequestID = 0;
+				}
 				break;
 			default:
 				break;