diff --git a/ggml/src/ggml-cuda/concat.cu b/ggml/src/ggml-cuda/concat.cu
index 118af91ee84bf7..de8f5874fccfef 100644
--- a/ggml/src/ggml-cuda/concat.cu
+++ b/ggml/src/ggml-cuda/concat.cu
@@ -124,7 +124,7 @@ static __global__ void __launch_bounds__(CUDA_CONCAT_BLOCK_SIZE)
           uint64_t   nb1,
           uint64_t   nb2,
           uint64_t   nb3){
-    static_assert(dim >= 0 && dim <= 3);
+    static_assert(dim >= 0 && dim <= 3, "dim must be between 0 and 3 inclusive");
 
     const int64_t i3 = blockIdx.z;
     const int64_t i2 = blockIdx.y;