1 files changed, 1 insertions, 1 deletions
diff --git a/main.cpp b/main.cpp
index 143585b..32c3a68 100644
--- a/main.cpp
+++ b/main.cpp
@@ -478,7 +478,7 @@ int main(int argc, char ** argv) {
                 std::string buffer;
                 if (!params.input_prefix.empty()) {
                     buffer += params.input_prefix;
-                    printf(buffer.c_str());
+                    printf("%s", buffer.c_str());
                 }
 
                 std::string line;