diff --git a/src/peripheral/cpuid.rs b/src/peripheral/cpuid.rs
index d9dc0272..c79ad18e 100644
--- a/src/peripheral/cpuid.rs
+++ b/src/peripheral/cpuid.rs
@@ -66,6 +66,7 @@ pub struct RegisterBlock {
 
 /// Type of cache to select on CSSELR writes.
 #[cfg(not(armv6m))]
+#[derive(Copy, Clone, Debug, PartialEq, Eq)]
 pub enum CsselrCacheType {
     /// Select DCache or unified cache
     DataOrUnified = 0,
diff --git a/src/peripheral/scb.rs b/src/peripheral/scb.rs
index 59eedbab..e3f3884a 100644
--- a/src/peripheral/scb.rs
+++ b/src/peripheral/scb.rs
@@ -97,7 +97,7 @@ pub struct RegisterBlock {
 
 /// FPU access mode
 #[cfg(has_fpu)]
-#[derive(Clone, Copy, Debug)]
+#[derive(Clone, Copy, Debug, PartialEq, Eq)]
 pub enum FpuAccessMode {
     /// FPU is not accessible
     Disabled,
diff --git a/src/peripheral/syst.rs b/src/peripheral/syst.rs
index ecefaeae..c1e97102 100644
--- a/src/peripheral/syst.rs
+++ b/src/peripheral/syst.rs
@@ -18,7 +18,7 @@ pub struct RegisterBlock {
 }
 
 /// SysTick clock source
-#[derive(Clone, Copy, Debug)]
+#[derive(Clone, Copy, Debug, PartialEq, Eq)]
 pub enum SystClkSource {
     /// Core-provided clock
     Core,