diff --git a/src/spd.c b/src/spd.c
index e90cc9c46..f869a693b 100644
--- a/src/spd.c
+++ b/src/spd.c
@@ -265,6 +265,8 @@ spd_register(uint8_t ram_type, uint8_t slot_mask, uint16_t max_module_size)
     			sdram_data->ca_hold = sdram_data->data_hold = 0x08;
     			sdram_data->spd_rev = 0x12;
     			sprintf(sdram_data->part_no, "86Box-SDR-%03dM", vslots[vslot]);
+    			for (i = strlen(sdram_data->part_no); i < sizeof(sdram_data->part_no); i++)
+    				sdram_data->part_no[i] = ' ';
     			sdram_data->mfg_year = 0x20;
     			sdram_data->mfg_week = 0x13;
     			sdram_data->freq = 100;