diff --git a/src/libcamera/pipeline/rkisp1/rkisp1.cpp b/src/libcamera/pipeline/rkisp1/rkisp1.cpp
index 79c8717c..138e1d5b 100644
--- a/src/libcamera/pipeline/rkisp1/rkisp1.cpp
+++ b/src/libcamera/pipeline/rkisp1/rkisp1.cpp
@@ -954,6 +954,7 @@ int PipelineHandlerRkISP1::configure(Camera *camera, CameraConfiguration *c)
 			if (data->usesDewarper_) {
 				outputCfgs.push_back(const_cast<StreamConfiguration &>(cfg));
 
+				ispCfg.bufferCount = kRkISP1MinBufferCount;
 				ispCfg.size = format.size;
 				ispCfg.stride =
 					PixelFormatInfo::info(ispCfg.pixelFormat)