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-rw-r--r--src/4D_api.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/4D_api.cpp b/src/4D_api.cpp
index 26e9456e..f37594b5 100644
--- a/src/4D_api.cpp
+++ b/src/4D_api.cpp
@@ -1557,7 +1557,7 @@ PJ_GRID_INFO proj_grid_info(const char *gridname) {
memset(&grinfo, 0, sizeof(PJ_GRID_INFO));
/* in case the grid wasn't found */
- if (gridinfo->filename == nullptr) {
+ if (gridinfo->filename == nullptr || gridinfo->ct == nullptr) {
pj_gridinfo_free(ctx, gridinfo);
strcpy(grinfo.format, "missing");
return grinfo;