diff --git a/configure.py b/configure.py
index 6044643d7..a8990c279 100644
--- a/configure.py
+++ b/configure.py
@@ -312,7 +312,7 @@
 # Game-specific flags
 cflags_bfbb = [
     *cflags_base,
-    "-lang=C++",
+    "-lang=c++",
     "-common on",
     "-char unsigned",
     "-str reuse,pool,readonly",