diff --git a/src/common/io/io_unix.c b/src/common/io/io_unix.c
index c29b43a9f..54689ffae 100644
--- a/src/common/io/io_unix.c
+++ b/src/common/io/io_unix.c
@@ -216,7 +216,11 @@ const char* ffGetTerminalResponse(const char* request, int nParams, const char*
         bytesRead += (size_t) nRead;
         buffer[bytesRead] = '\0';
 
-        int ret = vsscanf(buffer, format, args);
+        va_list cargs;
+        va_copy(cargs, args);
+        int ret = vsscanf(buffer, format, cargs);
+        va_end(cargs);
+
         if (ret <= 0)
         {
             va_end(args);
diff --git a/src/common/io/io_windows.c b/src/common/io/io_windows.c
index 742d564ff..632530ccc 100644
--- a/src/common/io/io_windows.c
+++ b/src/common/io/io_windows.c
@@ -274,7 +274,11 @@ const char* ffGetTerminalResponse(const char* request, int nParams, const char*
         bytesRead += bytes;
         buffer[bytesRead] = '\0';
 
+        va_list cargs;
+        va_copy(cargs, args);
         int ret = vsscanf(buffer, format, args);
+        va_end(cargs);
+
         if (ret <= 0)
         {
             va_end(args);