diff --git a/base/applications/cmdutils/reg/import.c b/base/applications/cmdutils/reg/import.c
index 1d4e3d53536..91442cf06b3 100644
--- a/base/applications/cmdutils/reg/import.c
+++ b/base/applications/cmdutils/reg/import.c
@@ -276,7 +276,12 @@ static BOOL parse_data_type(struct parser *parser, WCHAR **line)
 
             /* "hex(xx):" is special */
             val = wcstoul(*line, &end, 16);
+#ifdef __REACTOS__
+            /* Up to 8 hex digits, "hex(000000002)" is invalid */
+            if (*end != ')' || *(end + 1) != ':' || (val == ~0u && errno == ERANGE) || end - *line > 8)
+#else
             if (*end != ')' || *(end + 1) != ':' || (val == ~0u && errno == ERANGE))
+#endif
                 return FALSE;
 
             parser->data_type = val;
diff --git a/base/applications/regedit/regproc.c b/base/applications/regedit/regproc.c
index 1ef1fc9e6c2..f8d448e08c8 100644
--- a/base/applications/regedit/regproc.c
+++ b/base/applications/regedit/regproc.c
@@ -339,7 +339,12 @@ static BOOL parse_data_type(struct parser *parser, WCHAR **line)
 
             /* "hex(xx):" is special */
             val = wcstoul(*line, &end, 16);
+#ifdef __REACTOS__
+            /* Up to 8 hex digits, "hex(000000002)" is invalid */
+            if (*end != ')' || *(end + 1) != ':' || (val == ~0u && errno == ERANGE) || end - *line > 8)
+#else
             if (*end != ')' || *(end + 1) != ':' || (val == ~0u && errno == ERANGE))
+#endif
                 return FALSE;
 
             parser->data_type = val;