diff --git a/client/file_names.h b/client/file_names.h
index f6cf82047b..9c456c9903 100644
--- a/client/file_names.h
+++ b/client/file_names.h
@@ -71,7 +71,7 @@ extern void send_log_after(const char* filename, double t, MIOFILE& mf);
 #define CLIENT_OPAQUE_FILENAME      "client_opaque.txt"
 #define CONFIG_FILE                 "cc_config.xml"
 #define NVC_CONFIG_FILE             "nvc_config.xml"
-#define COPROC_INFO_FILENAME        "coproc_info.txt"
+#define COPROC_INFO_FILENAME        "coproc_info.xml"
 #define EMULATED_CPU_INFO_EXECUTABLE "detect_rosetta_cpu"
 #define EMULATED_CPU_INFO_FILENAME  "emulated_cpu_info.txt"
 #define CPU_BENCHMARKS_FILE_NAME    "cpu_benchmarks"