1 files changed, 3 insertions, 2 deletions

diff --git a/cpp/nissy.cpp b/cpp/nissy.cpp
index 25039bb..ed0dc0f 100644
--- a/cpp/nissy.cpp
+++ b/cpp/nissy.cpp
@@ -17,7 +17,8 @@ extern "C" {
         long long nissy_solverinfo(const char *, char *);
         long long nissy_gendata(const char *, unsigned long long,
             unsigned char *);
-        long long nissy_checkdata(unsigned long long, const unsigned char *);
+        long long nissy_checkdata(const char *, unsigned long long,
+            const unsigned char *);
         long long nissy_solve(const char *, const char *, unsigned, unsigned,
             unsigned, unsigned, unsigned, unsigned, unsigned long long,
             const unsigned char *, unsigned, char *, long long *,
@@ -144,7 +145,7 @@ namespace nissy {
 
         error solver::check_data()
         {
-                auto err_value = nissy_checkdata(data.size(),
+                auto err_value = nissy_checkdata(name.c_str(), data.size(),
                     reinterpret_cast<const unsigned char *>(data.data()));
                 error err{err_value};
                 data_checked = err.ok();