diff --git a/src/Mod/Spreadsheet/App/Cell.cpp b/src/Mod/Spreadsheet/App/Cell.cpp
index 4cfdd0d085..9be0092044 100644
--- a/src/Mod/Spreadsheet/App/Cell.cpp
+++ b/src/Mod/Spreadsheet/App/Cell.cpp
@@ -370,7 +370,7 @@ void Cell::setContent(const char * value)
             }
         }
 
-        if (!newExpr && *value != '\0') {
+        if (!newExpr && value && *value != '\0') {
             newExpr = std::make_unique<App::StringExpression>(owner->sheet(), value);
         }