diff --git a/driver/wsi.c b/driver/wsi.c
index aded9b9..76a3ee9 100644
--- a/driver/wsi.c
+++ b/driver/wsi.c
@@ -507,7 +507,7 @@ VKAPI_ATTR VkResult VKAPI_CALL RPIFUNC(vkAcquireNextImageKHR)(
 			break;
 		}
 
-		candidateIdx = (sc->backbufferIdx + 1) % sc->numImages;
+		candidateIdx = (candidateIdx + 1) % sc->numImages;
 	}
 
 	*pImageIndex = sc->backbufferIdx; //return back buffer index