diff --git a/source/blender/blenloader/intern/versioning_400.cc b/source/blender/blenloader/intern/versioning_400.cc
index bc977205f0d..2207766bf02 100644
--- a/source/blender/blenloader/intern/versioning_400.cc
+++ b/source/blender/blenloader/intern/versioning_400.cc
@@ -1863,10 +1863,12 @@ void blo_do_versions_400(FileData *fd, Library * /*lib*/, Main *bmain)
       const int curvetype = BKE_curve_type_get(curve);
       if (curvetype == OB_FONT) {
         CharInfo *info = curve->strinfo;
-        for (int i = curve->len_char32 - 1; i >= 0; i--, info++) {
-          if (info->mat_nr > 0) {
-            /** CharInfo mat_nr used to start at 1, unlike mesh & nurbs, now zero-based. */
-            info->mat_nr--;
+        if (info != nullptr) {
+          for (int i = curve->len_char32 - 1; i >= 0; i--, info++) {
+            if (info->mat_nr > 0) {
+              /** CharInfo mat_nr used to start at 1, unlike mesh & nurbs, now zero-based. */
+              info->mat_nr--;
+            }
           }
         }
       }