diff --git a/src/spi.rs b/src/spi.rs
index ebd37478699..df7b6a6db38 100644
--- a/src/spi.rs
+++ b/src/spi.rs
@@ -84,12 +84,11 @@ impl Dma {
             Dma::Disabled => TRANS_LEN,
             Dma::Channel1(size) | Dma::Channel2(size) | Dma::Auto(size) => *size,
         };
-        if max_transfer_size % 4 != 0 {
-            panic!("The max transfer size must be a multiple of 4")
-        } else if max_transfer_size > 4096 {
-            4096
-        } else {
-            max_transfer_size
+        match max_transfer_size {
+            x if x % 4 != 0 => panic!("The max transfer size must be a multiple of 4"),
+            x if x == 0 => panic!("The max transfer size must be greater than 0"),
+            x if x > 4096 => panic!("The max transfer size must be less than or equal to 4096"),
+            _ => max_transfer_size,
         }
     }
 }