diff --git a/module/zfs/vdev_raidz_math_avx512f.c b/module/zfs/vdev_raidz_math_avx512f.c
index adbe9b0ef1..b89e18c0c9 100644
--- a/module/zfs/vdev_raidz_math_avx512f.c
+++ b/module/zfs/vdev_raidz_math_avx512f.c
@@ -29,6 +29,7 @@
 
 #include <sys/types.h>
 #include <sys/simd.h>
+#include <sys/debug.h>
 
 #define	__asm __asm__ __volatile__
 
@@ -194,6 +195,8 @@ typedef struct v {
 		    "vpternlogd $0x6c,%zmm29, %zmm26, %" VR0(r) "\n"	\
 		    "vpternlogd $0x6c,%zmm29, %zmm25, %" VR1(r));	\
 		break;							\
+	default:							\
+		VERIFY(0);						\
 	}								\
 }
 
@@ -370,6 +373,9 @@ gf_x2_mul_fns[256] = {
 		COPY(R_23(r), _mul_x2_in);				\
 		gf_x2_mul_fns[c]();					\
 		COPY(_mul_x2_acc, R_23(r));				\
+		break;							\
+	default:							\
+		VERIFY(0);						\
 	}								\
 }
 
diff --git a/module/zfs/vdev_raidz_math_sse2.c b/module/zfs/vdev_raidz_math_sse2.c
index 70a21c10c8..12d7bda01a 100644
--- a/module/zfs/vdev_raidz_math_sse2.c
+++ b/module/zfs/vdev_raidz_math_sse2.c
@@ -28,6 +28,7 @@
 
 #include <sys/types.h>
 #include <sys/simd.h>
+#include <sys/debug.h>
 
 #define	__asm __asm__ __volatile__
 
@@ -125,6 +126,8 @@ typedef struct v {
 		__asm(							\
 		    "movdqa %" VR0(r) ", %" VR1(r));			\
 		break;							\
+	default:							\
+		VERIFY(0);						\
 	}								\
 }
 
@@ -175,6 +178,8 @@ typedef struct v {
 		    "movdqa %%" VR0(r)", 0x00(%[DST])\n"		\
 		    : : [DST] "r" (dst));				\
 		break;							\
+	default:							\
+		VERIFY(0);						\
 	}								\
 }
 
@@ -508,6 +513,8 @@ gf_x2_mul_fns[256] = {
 		gf_x1_mul_fns[c]();					\
 		COPY(_mul_x1_acc, r);					\
 		break;							\
+	default:							\
+		VERIFY(0);						\
 	}								\
 }