diff --git a/src/spi.rs b/src/spi.rs
index 7628a0a..c2f5dcc 100644
--- a/src/spi.rs
+++ b/src/spi.rs
@@ -133,7 +133,7 @@ impl <SPI: Transfer<u8>,
                 // Disable chip select
                 cortex_m::asm::delay(10_u32);
                 self.nss.set_high();
-                cortex_m::asm::delay(4_u32);
+                cortex_m::asm::delay(5_u32);
                 Ok(buf[2])
             },
             // TODO: Maybe too naive?
@@ -141,7 +141,7 @@ impl <SPI: Transfer<u8>,
                 // Disable chip select
                 cortex_m::asm::delay(10_u32);
                 self.nss.set_high();
-                cortex_m::asm::delay(4_u32);
+                cortex_m::asm::delay(5_u32);
                 Err(SpiPortError::TransferError)
             }
         }