diff --git a/crypto/x509/x509_att.c b/crypto/x509/x509_att.c
index 5b002832c1d09..c9e2b26c7a82c 100644
--- a/crypto/x509/x509_att.c
+++ b/crypto/x509/x509_att.c
@@ -123,7 +123,8 @@ STACK_OF(X509_ATTRIBUTE) *X509at_add1_attr(STACK_OF(X509_ATTRIBUTE) **x,
         return NULL;
     }
     if (*x != NULL && X509at_get_attr_by_OBJ(*x, attr->object, -1) != -1) {
-        ERR_raise(ERR_LIB_X509, X509_R_DUPLICATE_ATTRIBUTE);
+        ERR_raise_data(ERR_LIB_X509, X509_R_DUPLICATE_ATTRIBUTE,
+                       "name=%s", OBJ_nid2sn(OBJ_obj2nid(attr->object)));
         return NULL;
     }
 
@@ -158,7 +159,8 @@ STACK_OF(X509_ATTRIBUTE) *X509at_add1_attr_by_OBJ(STACK_OF(X509_ATTRIBUTE)
         return NULL;
     }
     if (*x != NULL && X509at_get_attr_by_OBJ(*x, obj, -1) != -1) {
-        ERR_raise(ERR_LIB_X509, X509_R_DUPLICATE_ATTRIBUTE);
+        ERR_raise_data(ERR_LIB_X509, X509_R_DUPLICATE_ATTRIBUTE,
+                       "name=%s", OBJ_nid2sn(OBJ_obj2nid(obj)));
         return NULL;
     }
 
@@ -191,7 +193,8 @@ STACK_OF(X509_ATTRIBUTE) *X509at_add1_attr_by_NID(STACK_OF(X509_ATTRIBUTE)
         return NULL;
     }
     if (*x != NULL && X509at_get_attr_by_NID(*x, nid, -1) != -1) {
-        ERR_raise(ERR_LIB_X509, X509_R_DUPLICATE_ATTRIBUTE);
+        ERR_raise_data(ERR_LIB_X509, X509_R_DUPLICATE_ATTRIBUTE,
+                       "name=%s", OBJ_nid2sn(nid));
         return NULL;
     }