diff --git a/src/layer/x86/deconvolution_x86.cpp b/src/layer/x86/deconvolution_x86.cpp
index 6d7c3aaaa..7226f7a64 100644
--- a/src/layer/x86/deconvolution_x86.cpp
+++ b/src/layer/x86/deconvolution_x86.cpp
@@ -150,7 +150,6 @@ int Deconvolution_x86::forward(const Mat& bottom_blob, Mat& top_blob, const Opti
 
     int w = bottom_blob.w;
     int h = bottom_blob.h;
-    int channels = bottom_blob.c;
     size_t elemsize = bottom_blob.elemsize;
     int elempack = bottom_blob.elempack;