diff --git a/zdump/df_vmdump.h b/zdump/df_vmdump.h
index 6b158fc7..22029826 100644
--- a/zdump/df_vmdump.h
+++ b/zdump/df_vmdump.h
@@ -38,6 +38,7 @@ const u8 ADSR_MAGIC[2] = { 0xe2, 0xd9 }; /* 'SR' EBCDIC */
 const u8 VMDUMP_MAGIC[8] = { 0xe5, 0xd4, 0xc4, 0xe4, 0xd4, 0xd7, 0x40, 0x40 }; /* 'VMDUMP  ' EBCDIC */
 const u8 FMBK_MAGIC[8] = { 0xc8, 0xc3, 0xd7, 0xc4, 0xc6, 0xd4, 0xc2, 0xd2 }; /* 'HCPDFMBK' EBCDIC */
 const u8 ALBK_MAGIC[8] = { 0xc8, 0xc3, 0xd7, 0xc4, 0xc1, 0xd3, 0xc2, 0xd2 }; /* 'HCPDALBK' EBCDIC */
+const u8 ASIZBK_MAGIC[8] = { 0xc1, 0xe2, 0xc9, 0xe9, 0xc2, 0xd2, 0x40, 0x40 };/* 'ASIZBK  ' EBCDIC */
 
 /*
  * Layout of dump symptom record . The ADSR is always the first record in
@@ -110,12 +111,12 @@ struct vmd_oltble {
 	u64 end_addr;
 } __packed;
 
-struct vmd_asibk_64_new {
-	u8 id[8];
+struct vmd_asizbk {
+	u8 id[sizeof(ASIZBK_MAGIC)];
 	u8 as_token[8];
 	u8 spaceid[33];
 	u8 reserved1[2];
-	u8 asibk_format;
+	u8 asizbk_format;
 	u8 reserved2[12];
 	u64 storage_size_with_dcss;
 	u64 storage_size_def_store;
@@ -204,6 +205,6 @@ struct vmd_fir_other_64 {
 
 #define DF_VMDUMP_HDR_SIZE                                                                         \
 	(sizeof(struct vmd_adsr) + sizeof(struct vmd_fmbk) + sizeof(struct vmd_fir_basic) +        \
-	 sizeof(struct vmd_albk) + sizeof(struct vmd_asibk_64_new) + sizeof(struct vmd_fir_64))
+	 sizeof(struct vmd_albk) + sizeof(struct vmd_asizbk) + sizeof(struct vmd_fir_64))
 
 #endif
diff --git a/zdump/dfi_vmdump.c b/zdump/dfi_vmdump.c
index f5b3913a..3787c30b 100644
--- a/zdump/dfi_vmdump.c
+++ b/zdump/dfi_vmdump.c
@@ -36,7 +36,7 @@ static struct {
 	struct vmd_fir_basic fir_basic; /* Dump file info record */
 	struct vmd_albk albk;		/* Dump access list record */
 
-	struct vmd_asibk_64_new asibk_new;
+	struct vmd_asizbk asizbk;
 	struct vmd_fir_64 fir;
 	struct vmd_fir_other_64 *fir_other;
 
@@ -81,7 +81,7 @@ static void vmdump64big_debug(void)
 	util_log_print(UTIL_LOG_DEBUG, "Bit-Key Pages: %lu\n", l.bitkey_pages_count);
 	util_log_print(UTIL_LOG_DEBUG, "Memory Offset: %#lx\n", l.memory_start_record);
 	util_log_print(UTIL_LOG_DEBUG, "Total Pages  : %lu\n",
-		       l.asibk_new.storage_size_def_store / PAGE_SIZE);
+		       l.asizbk.storage_size_def_store / PAGE_SIZE);
 	util_log_print(UTIL_LOG_DEBUG, "Stored Pages : %lu\n", l.stored_pages_count);
 
 	/* adsr */
@@ -185,9 +185,11 @@ static void vmdump64big_init(void)
 	zg_seek(g.fh, (l.fmbk.rec_nr_access - 1) * PAGE_SIZE, SEEK_SET);
 	zg_read(g.fh, &l.albk, sizeof(l.albk), SEEK_SET);
 
-	/* Record 9: asibk */
+	/* Record 9: asizbk */
 	zg_seek(g.fh, l.fmbk.rec_nr_access * PAGE_SIZE, ZG_CHECK);
-	zg_read(g.fh, &l.asibk_new, sizeof(l.asibk_new), ZG_CHECK);
+	zg_read(g.fh, &l.asizbk, sizeof(l.asizbk), ZG_CHECK);
+	if (memcmp(l.asizbk.id, ASIZBK_MAGIC, sizeof(l.asizbk.id)))
+		ERR_EXIT("Dump file inconsistent, invalid ASIZBK record detected");
 
 	l.memory_start_record = (l.fmbk.rec_nr_access + 1) * PAGE_SIZE;
 
@@ -195,8 +197,8 @@ static void vmdump64big_init(void)
 	 * Record 10: bitmaps:
 	 * Read all bitmap pages and setup bitmap array
 	 */
-	nr_dumped_pages = l.asibk_new.storage_size_def_store / PAGE_SIZE;
-	bitmap_sz = l.asibk_new.storage_size_def_store / (PAGE_SIZE * 8);
+	nr_dumped_pages = l.asizbk.storage_size_def_store / PAGE_SIZE;
+	bitmap_sz = l.asizbk.storage_size_def_store / (PAGE_SIZE * 8);
 	if (!bitmap_sz)
 		ERR_EXIT("Dump file inconsistent, no bitmap detected");
 	l.bitmap = util_zalloc(bitmap_sz);
@@ -441,7 +443,7 @@ static u64 find_bitrange(u8 *bitmap, const u64 bit, const u64 max, const bool is
 
 static void mem_init(void)
 {
-	u64 nr_dumped_pages = l.asibk_new.storage_size_def_store / PAGE_SIZE;
+	u64 nr_dumped_pages = l.asizbk.storage_size_def_store / PAGE_SIZE;
 	u64 pos, more;
 
 	for (pos = 0; pos < nr_dumped_pages;) {