diff --git a/paddle/gserver/layers/ConvProjection.cpp b/paddle/gserver/layers/ConvProjection.cpp
index aa634b3287dedfae7b573e76270ac75e91418da8..e1c4b91ace21522a3bc640dfc4eaa1a42668ed02 100644
--- a/paddle/gserver/layers/ConvProjection.cpp
+++ b/paddle/gserver/layers/ConvProjection.cpp
@@ -130,6 +130,10 @@ void ConvProjection::reshapeTensorDesc(int batchSize) {
 void ConvProjection::reshape(int batchSize) {
   size_t width = calOutputSize();
   CHECK_EQ(width, out_->value->getWidth());
+  CHECK_EQ(channels_ * imageH_ * imageW_, in_->value->getWidth())
+      << "Wrong input size for convolution"
+      << " channels=" << channels_ << " imageH=" << imageH_
+      << " imageW=" << imageW_ << " inputSize=" << in_->value->getWidth();
 
   isSelectAlgo_ = (batchSize == batchNum_);
   batchNum_ = batchSize;