diff --git a/lib/cache_segtype/cache.c b/lib/cache_segtype/cache.c
index 20c575c8c..b6c47b07b 100644
--- a/lib/cache_segtype/cache.c
+++ b/lib/cache_segtype/cache.c
@@ -423,7 +423,7 @@ static int _modules_needed(struct dm_pool *mem,
 }
 #endif /* DEVMAPPER_SUPPORT */
 
-static struct segtype_handler _cache_pool_ops = {
+static const struct segtype_handler _cache_pool_ops = {
 	.display = _cache_display,
 	.text_import = _cache_pool_text_import,
 	.text_import_area_count = _cache_pool_text_import_area_count,
@@ -762,7 +762,7 @@ static int _cache_add_target_line(struct dev_manager *dm,
 }
 #endif /* DEVMAPPER_SUPPORT */
 
-static struct segtype_handler _cache_ops = {
+static const struct segtype_handler _cache_ops = {
 	.display = _cache_display,
 	.text_import = _cache_text_import,
 	.text_import_area_count = _cache_text_import_area_count,
diff --git a/lib/error/errseg.c b/lib/error/errseg.c
index bbdf235b8..50f3b8c90 100644
--- a/lib/error/errseg.c
+++ b/lib/error/errseg.c
@@ -81,7 +81,7 @@ static void _errseg_destroy(struct segment_type *segtype)
 	free(segtype);
 }
 
-static struct segtype_handler _error_ops = {
+static const struct segtype_handler _error_ops = {
 	.merge_segments = _errseg_merge_segments,
 #ifdef DEVMAPPER_SUPPORT
 	.add_target_line = _errseg_add_target_line,
diff --git a/lib/integrity/integrity.c b/lib/integrity/integrity.c
index e4f99b400..1576c856f 100644
--- a/lib/integrity/integrity.c
+++ b/lib/integrity/integrity.c
@@ -307,7 +307,7 @@ static int _integrity_add_target_line(struct dev_manager *dm,
 }
 #endif /* DEVMAPPER_SUPPORT */
 
-static struct segtype_handler _integrity_ops = {
+static const struct segtype_handler _integrity_ops = {
 	.display = _integrity_display,
 	.text_import = _integrity_text_import,
 	.text_import_area_count = _integrity_text_import_area_count,
diff --git a/lib/metadata/segtype.h b/lib/metadata/segtype.h
index 54f3f8330..9f16cdb7c 100644
--- a/lib/metadata/segtype.h
+++ b/lib/metadata/segtype.h
@@ -236,7 +236,7 @@ struct segment_type {
 	uint64_t flags;
 	uint32_t parity_devs;		/* Parity drives required by segtype */
 
-	struct segtype_handler *ops;
+	const struct segtype_handler *ops;
 	const char *name;
 	const char *dso;
 
diff --git a/lib/mirror/mirrored.c b/lib/mirror/mirrored.c
index 83f1bffcb..cdf7a0d48 100644
--- a/lib/mirror/mirrored.c
+++ b/lib/mirror/mirrored.c
@@ -491,7 +491,7 @@ static void _mirrored_destroy(struct segment_type *segtype)
 	free(segtype);
 }
 
-static struct segtype_handler _mirrored_ops = {
+static const struct segtype_handler _mirrored_ops = {
 	.display = _mirrored_display,
 	.text_import_area_count = _mirrored_text_import_area_count,
 	.text_import = _mirrored_text_import,
diff --git a/lib/raid/raid.c b/lib/raid/raid.c
index 2f1eb6cf8..9732c3dd5 100644
--- a/lib/raid/raid.c
+++ b/lib/raid/raid.c
@@ -616,7 +616,7 @@ static int _raid_target_unmonitor_events(struct lv_segment *seg, int events)
 #  endif /* DMEVENTD */
 #endif /* DEVMAPPER_SUPPORT */
 
-static struct segtype_handler _raid_ops = {
+static const struct segtype_handler _raid_ops = {
 	.display = _raid_display,
 	.text_import_area_count = _raid_text_import_area_count,
 	.text_import = _raid_text_import,
diff --git a/lib/snapshot/snapshot.c b/lib/snapshot/snapshot.c
index 8446a6914..0ec5320c5 100644
--- a/lib/snapshot/snapshot.c
+++ b/lib/snapshot/snapshot.c
@@ -229,7 +229,7 @@ static void _snap_destroy(struct segment_type *segtype)
 	free(segtype);
 }
 
-static struct segtype_handler _snapshot_ops = {
+static const struct segtype_handler _snapshot_ops = {
 	.target_name = _snap_target_name,
 	.text_import = _snap_text_import,
 	.text_export = _snap_text_export,
diff --git a/lib/striped/striped.c b/lib/striped/striped.c
index efed16982..1ff1ebdad 100644
--- a/lib/striped/striped.c
+++ b/lib/striped/striped.c
@@ -216,7 +216,7 @@ static void _striped_destroy(struct segment_type *segtype)
 	free(segtype);
 }
 
-static struct segtype_handler _striped_ops = {
+static const struct segtype_handler _striped_ops = {
 	.name = _striped_name,
 	.display = _striped_display,
 	.text_import_area_count = _striped_text_import_area_count,
diff --git a/lib/thin/thin.c b/lib/thin/thin.c
index 9ce04438d..eba2cce30 100644
--- a/lib/thin/thin.c
+++ b/lib/thin/thin.c
@@ -743,7 +743,7 @@ static void _thin_destroy(struct segment_type *segtype)
 	free(segtype);
 }
 
-static struct segtype_handler _thin_pool_ops = {
+static const struct segtype_handler _thin_pool_ops = {
 	.display = _thin_pool_display,
 	.text_import = _thin_pool_text_import,
 	.text_import_area_count = _thin_pool_text_import_area_count,
@@ -762,7 +762,7 @@ static struct segtype_handler _thin_pool_ops = {
 	.destroy = _thin_destroy,
 };
 
-static struct segtype_handler _thin_ops = {
+static const struct segtype_handler _thin_ops = {
 	.display = _thin_display,
 	.text_import = _thin_text_import,
 	.text_export = _thin_text_export,
@@ -783,7 +783,7 @@ int init_multiple_segtypes(struct cmd_context *cmd, struct segtype_library *segl
 #endif
 {
 	static const struct {
-		struct segtype_handler *ops;
+		const struct segtype_handler *ops;
 		const char name[16];
 		uint32_t flags;
 	} reg_segtypes[] = {
diff --git a/lib/unknown/unknown.c b/lib/unknown/unknown.c
index b7c06ace6..51aaebba5 100644
--- a/lib/unknown/unknown.c
+++ b/lib/unknown/unknown.c
@@ -54,7 +54,7 @@ static void _unknown_destroy(struct segment_type *segtype)
 	free(segtype);
 }
 
-static struct segtype_handler _unknown_ops = {
+static const struct segtype_handler _unknown_ops = {
 	.text_import = _unknown_text_import,
 	.text_export = _unknown_text_export,
 	.destroy = _unknown_destroy,
diff --git a/lib/vdo/vdo.c b/lib/vdo/vdo.c
index 6d3b67421..75a73eb57 100644
--- a/lib/vdo/vdo.c
+++ b/lib/vdo/vdo.c
@@ -562,7 +562,7 @@ static void _vdo_pool_destroy(struct segment_type *segtype)
 	free((void *)segtype);
 }
 
-static struct segtype_handler _vdo_ops = {
+static const struct segtype_handler _vdo_ops = {
 	.name = _vdo_name,
 	.display = _vdo_display,
 	.text_import = _vdo_text_import,
@@ -578,7 +578,7 @@ static struct segtype_handler _vdo_ops = {
 	.destroy = _vdo_pool_destroy,
 };
 
-static struct segtype_handler _vdo_pool_ops = {
+static const struct segtype_handler _vdo_pool_ops = {
 	.name = _vdo_pool_name,
 	.display = _vdo_pool_display,
 	.text_import = _vdo_pool_text_import,
diff --git a/lib/writecache/writecache.c b/lib/writecache/writecache.c
index 8ccaca2d0..4d56317f5 100644
--- a/lib/writecache/writecache.c
+++ b/lib/writecache/writecache.c
@@ -357,7 +357,7 @@ static int _writecache_add_target_line(struct dev_manager *dm,
 }
 #endif /* DEVMAPPER_SUPPORT */
 
-static struct segtype_handler _writecache_ops = {
+static const struct segtype_handler _writecache_ops = {
 	.display = _writecache_display,
 	.text_import = _writecache_text_import,
 	.text_import_area_count = _writecache_text_import_area_count,
diff --git a/lib/zero/zero.c b/lib/zero/zero.c
index cb204fc40..3e5bdbdc9 100644
--- a/lib/zero/zero.c
+++ b/lib/zero/zero.c
@@ -75,7 +75,7 @@ static void _zero_destroy(struct segment_type *segtype)
 	free(segtype);
 }
 
-static struct segtype_handler _zero_ops = {
+static const struct segtype_handler _zero_ops = {
 	.merge_segments = _zero_merge_segments,
 #ifdef DEVMAPPER_SUPPORT
 	.add_target_line = _zero_add_target_line,