diff --git a/sys/dev/hwpmc/hwpmc_powerpc.c b/sys/dev/hwpmc/hwpmc_powerpc.c
--- a/sys/dev/hwpmc/hwpmc_powerpc.c
+++ b/sys/dev/hwpmc/hwpmc_powerpc.c
@@ -604,7 +604,7 @@
 	}
 
 	/* Set the value for kern.hwpmc.cpuid */
-	snprintf(pmc_cpuid, sizeof(pmc_cpuid), "%08jx", (uintmax_t)mfpvr());
+	snprintf(pmc_cpuid, sizeof(pmc_cpuid), "%08x", mfpvr());
 
 	return (pmc_mdep);
 }
diff --git a/sys/powerpc/include/cpufunc.h b/sys/powerpc/include/cpufunc.h
--- a/sys/powerpc/include/cpufunc.h
+++ b/sys/powerpc/include/cpufunc.h
@@ -125,10 +125,10 @@
 	return (value);
 }
 
-static __inline register_t
+static __inline uint32_t
 mfpvr(void)
 {
-	register_t value;
+	uint32_t value;
 
 	__asm __volatile ("mfpvr %0" : "=r"(value));