diff --git a/arch/x86/events/amd/iommu.c b/arch/x86/events/amd/iommu.c
index b15f7b950d2e..f8228d8243f7 100644
--- a/arch/x86/events/amd/iommu.c
+++ b/arch/x86/events/amd/iommu.c
@@ -30,7 +30,7 @@
 #define GET_DOMID_MASK(x)  (((x)->conf1 >> 16) & 0xFFFFULL)
 #define GET_PASID_MASK(x)  (((x)->conf1 >> 32) & 0xFFFFFULL)
 
-#define IOMMU_NAME_SIZE 16
+#define IOMMU_NAME_SIZE 24
 
 struct perf_amd_iommu {
 	struct list_head list;