diff --git a/lib/arm/cpu_features.h b/lib/arm/cpu_features.h
index 4fa6e43a..30920c6b 100644
--- a/lib/arm/cpu_features.h
+++ b/lib/arm/cpu_features.h
@@ -43,11 +43,11 @@
 #  define HAVE_DYNAMIC_ARM_CPU_FEATURES	1
 #endif
 
-#define ARM_CPU_FEATURE_NEON		0x00000001
-#define ARM_CPU_FEATURE_PMULL		0x00000002
-#define ARM_CPU_FEATURE_CRC32		0x00000004
-#define ARM_CPU_FEATURE_SHA3		0x00000008
-#define ARM_CPU_FEATURE_DOTPROD		0x00000010
+#define ARM_CPU_FEATURE_NEON		(1 << 0)
+#define ARM_CPU_FEATURE_PMULL		(1 << 1)
+#define ARM_CPU_FEATURE_CRC32		(1 << 2)
+#define ARM_CPU_FEATURE_SHA3		(1 << 3)
+#define ARM_CPU_FEATURE_DOTPROD		(1 << 4)
 
 #define HAVE_NEON(features)	(HAVE_NEON_NATIVE    || ((features) & ARM_CPU_FEATURE_NEON))
 #define HAVE_PMULL(features)	(HAVE_PMULL_NATIVE   || ((features) & ARM_CPU_FEATURE_PMULL))
@@ -56,7 +56,7 @@
 #define HAVE_DOTPROD(features)	(HAVE_DOTPROD_NATIVE || ((features) & ARM_CPU_FEATURE_DOTPROD))
 
 #if HAVE_DYNAMIC_ARM_CPU_FEATURES
-#define ARM_CPU_FEATURES_KNOWN		0x80000000
+#define ARM_CPU_FEATURES_KNOWN		(1U << 31)
 extern volatile u32 libdeflate_arm_cpu_features;
 
 void libdeflate_init_arm_cpu_features(void);
diff --git a/lib/x86/cpu_features.h b/lib/x86/cpu_features.h
index a8159964..b4c00118 100644
--- a/lib/x86/cpu_features.h
+++ b/lib/x86/cpu_features.h
@@ -39,27 +39,27 @@
 #  define HAVE_DYNAMIC_X86_CPU_FEATURES	1
 #endif
 
-#define X86_CPU_FEATURE_SSE2		0x00000001
-#define X86_CPU_FEATURE_PCLMULQDQ	0x00000002
-#define X86_CPU_FEATURE_AVX		0x00000004
-#define X86_CPU_FEATURE_AVX2		0x00000008
-#define X86_CPU_FEATURE_BMI2		0x00000010
+#define X86_CPU_FEATURE_SSE2		(1 << 0)
+#define X86_CPU_FEATURE_PCLMULQDQ	(1 << 1)
+#define X86_CPU_FEATURE_AVX		(1 << 2)
+#define X86_CPU_FEATURE_AVX2		(1 << 3)
+#define X86_CPU_FEATURE_BMI2		(1 << 4)
 /*
  * ZMM indicates whether 512-bit vectors (zmm registers) should be used.  On
  * some CPUs, to avoid downclocking issues we don't set ZMM even if the CPU
  * supports it, i.e. even if AVX512F is set.  On these CPUs, we may still use
  * AVX-512 instructions, but only with ymm and xmm registers.
  */
-#define X86_CPU_FEATURE_ZMM		0x00000020
-#define X86_CPU_FEATURE_AVX512F		0x00000040
-#define X86_CPU_FEATURE_AVX512BW	0x00000080
-#define X86_CPU_FEATURE_AVX512VL	0x00000100
-#define X86_CPU_FEATURE_VPCLMULQDQ	0x00000200
-#define X86_CPU_FEATURE_AVX512VNNI	0x00000400
-#define X86_CPU_FEATURE_AVXVNNI		0x00000800
+#define X86_CPU_FEATURE_ZMM		(1 << 5)
+#define X86_CPU_FEATURE_AVX512F		(1 << 6)
+#define X86_CPU_FEATURE_AVX512BW	(1 << 7)
+#define X86_CPU_FEATURE_AVX512VL	(1 << 8)
+#define X86_CPU_FEATURE_VPCLMULQDQ	(1 << 9)
+#define X86_CPU_FEATURE_AVX512VNNI	(1 << 10)
+#define X86_CPU_FEATURE_AVXVNNI		(1 << 11)
 
 #if HAVE_DYNAMIC_X86_CPU_FEATURES
-#define X86_CPU_FEATURES_KNOWN		0x80000000
+#define X86_CPU_FEATURES_KNOWN		(1U << 31)
 extern volatile u32 libdeflate_x86_cpu_features;
 
 void libdeflate_init_x86_cpu_features(void);