diff --git a/src/udev/dmi_memory_id/dmi_memory_id.c b/src/udev/dmi_memory_id/dmi_memory_id.c
index 67861cd364..bae05b8ecd 100644
--- a/src/udev/dmi_memory_id/dmi_memory_id.c
+++ b/src/udev/dmi_memory_id/dmi_memory_id.c
@@ -417,9 +417,9 @@ static void dmi_memory_device_size_detail(
                 dmi_print_memory_size("MEMORY_DEVICE", attr_suffix, slot_num, code, MEMORY_SIZE_UNIT_BYTES);
 }
 
-static void dmi_decode(const struct dmi_header *h) {
+static void dmi_decode(const struct dmi_header *h,
+                       unsigned *next_slot_num) {
         const uint8_t *data = h->data;
-        static unsigned next_slot_num = 0;
         unsigned slot_num;
 
         /*
@@ -441,15 +441,14 @@ static void dmi_decode(const struct dmi_header *h) {
                         dmi_print_memory_size("MEMORY_ARRAY", "MAX_CAPACITY", -1, DWORD(data + 0x07), MEMORY_SIZE_UNIT_KB);
                 else if (h->length >= 0x17)
                         dmi_print_memory_size("MEMORY_ARRAY", "MAX_CAPACITY", -1, QWORD(data + 0x0F), MEMORY_SIZE_UNIT_BYTES);
-                printf("MEMORY_ARRAY_NUM_DEVICES=%u\n", WORD(data + 0x0D));
 
                 break;
 
         case 17: /* 7.18 Memory Device */
-                slot_num = next_slot_num;
-                next_slot_num++;
+                slot_num = *next_slot_num;
+                *next_slot_num = slot_num + 1;
 
-                log_debug("Memory Device");
+                log_debug("Memory Device: %u", slot_num);
                 if (h->length < 0x15)
                         break;
 
@@ -525,6 +524,7 @@ static void dmi_decode(const struct dmi_header *h) {
 
 static void dmi_table_decode(const uint8_t *buf, size_t len, uint16_t num) {
         const uint8_t *data = buf;
+        unsigned next_slot_num = 0;
 
         /* 4 is the length of an SMBIOS structure header */
         for (uint16_t i = 0; (i < num || num == 0) && data + 4 <= buf + len; i++) {
@@ -559,10 +559,12 @@ static void dmi_table_decode(const uint8_t *buf, size_t len, uint16_t num) {
                         break;
 
                 if (display)
-                        dmi_decode(&h);
+                        dmi_decode(&h, &next_slot_num);
 
                 data = next;
         }
+        if (next_slot_num > 0)
+                printf("MEMORY_ARRAY_NUM_DEVICES=%u\n", next_slot_num);
 }
 
 static int dmi_table(int64_t base, uint32_t len, uint16_t num, const char *devmem, bool no_file_offset) {
diff --git a/test/dmidecode-dumps/HP-Z600.bin.txt b/test/dmidecode-dumps/HP-Z600.bin.txt
index d17fb8307f..58af9ac0e2 100644
--- a/test/dmidecode-dumps/HP-Z600.bin.txt
+++ b/test/dmidecode-dumps/HP-Z600.bin.txt
@@ -1,11 +1,9 @@
 MEMORY_ARRAY_LOCATION=System Board Or Motherboard
 MEMORY_ARRAY_EC_TYPE=Multi-bit ECC
 MEMORY_ARRAY_MAX_CAPACITY=12884901888
-MEMORY_ARRAY_NUM_DEVICES=3
 MEMORY_ARRAY_LOCATION=System Board Or Motherboard
 MEMORY_ARRAY_EC_TYPE=Multi-bit ECC
 MEMORY_ARRAY_MAX_CAPACITY=12884901888
-MEMORY_ARRAY_NUM_DEVICES=3
 MEMORY_DEVICE_0_TOTAL_WIDTH=72
 MEMORY_DEVICE_0_DATA_WIDTH=64
 MEMORY_DEVICE_0_SIZE=8589934592
@@ -92,3 +90,4 @@ MEMORY_DEVICE_6_MANUFACTURER=Not Specified
 MEMORY_DEVICE_6_SERIAL_NUMBER=Not Specified
 MEMORY_DEVICE_6_ASSET_TAG=Not Specified
 MEMORY_DEVICE_6_PART_NUMBER=Not Specified
+MEMORY_ARRAY_NUM_DEVICES=7
diff --git a/test/dmidecode-dumps/Lenovo-ThinkPad-X280.bin.txt b/test/dmidecode-dumps/Lenovo-ThinkPad-X280.bin.txt
index 26a8faf5d8..d1c75e976c 100644
--- a/test/dmidecode-dumps/Lenovo-ThinkPad-X280.bin.txt
+++ b/test/dmidecode-dumps/Lenovo-ThinkPad-X280.bin.txt
@@ -1,6 +1,5 @@
 MEMORY_ARRAY_LOCATION=System Board Or Motherboard
 MEMORY_ARRAY_MAX_CAPACITY=34359738368
-MEMORY_ARRAY_NUM_DEVICES=2
 MEMORY_DEVICE_0_TOTAL_WIDTH=64
 MEMORY_DEVICE_0_DATA_WIDTH=64
 MEMORY_DEVICE_0_SIZE=4294967296
@@ -31,3 +30,4 @@ MEMORY_DEVICE_1_ASSET_TAG=None
 MEMORY_DEVICE_1_RANK=1
 MEMORY_DEVICE_1_CONFIGURED_SPEED_MTS=2400
 MEMORY_DEVICE_1_CONFIGURED_VOLTAGE=1
+MEMORY_ARRAY_NUM_DEVICES=2
diff --git a/test/dmidecode-dumps/Lenovo-Thinkcentre-m720s.bin.txt b/test/dmidecode-dumps/Lenovo-Thinkcentre-m720s.bin.txt
index c90af66a7b..c9c3eda1c2 100644
--- a/test/dmidecode-dumps/Lenovo-Thinkcentre-m720s.bin.txt
+++ b/test/dmidecode-dumps/Lenovo-Thinkcentre-m720s.bin.txt
@@ -1,6 +1,5 @@
 MEMORY_ARRAY_LOCATION=System Board Or Motherboard
 MEMORY_ARRAY_MAX_CAPACITY=68719476736
-MEMORY_ARRAY_NUM_DEVICES=4
 MEMORY_DEVICE_0_TOTAL_WIDTH=64
 MEMORY_DEVICE_0_DATA_WIDTH=64
 MEMORY_DEVICE_0_SIZE=8589934592
@@ -65,3 +64,4 @@ MEMORY_DEVICE_3_CONFIGURED_SPEED_MTS=2400
 MEMORY_DEVICE_3_MINIMUM_VOLTAGE=1
 MEMORY_DEVICE_3_MAXIMUM_VOLTAGE=1
 MEMORY_DEVICE_3_CONFIGURED_VOLTAGE=1
+MEMORY_ARRAY_NUM_DEVICES=4