1 files changed, 5 insertions, 0 deletions
diff --git a/src/iso19111/io.cpp b/src/iso19111/io.cpp
index 03fb6977..51fda1c1 100644
--- a/src/iso19111/io.cpp
+++ b/src/iso19111/io.cpp
@@ -5342,6 +5342,11 @@ const std::string &PROJStringFormatter::toString() const {
             }
         }
     }
+
+    if (d->result_.empty()) {
+        d->appendToResult("+proj=noop");
+    }
+
     return d->result_;
 }