diff --git a/options/ansi/generic/complex-stubs.cpp b/options/ansi/generic/complex-stubs.c
similarity index 90%
rename from options/ansi/generic/complex-stubs.cpp
rename to options/ansi/generic/complex-stubs.c
index 9508439d2f..069626bd08 100644
--- a/options/ansi/generic/complex-stubs.cpp
+++ b/options/ansi/generic/complex-stubs.c
@@ -1,7 +1,5 @@
 #include <complex.h>
 
-extern "C" {
-
 long double cimagl(long double complex z) {
     return __imag__(z);
 }
@@ -9,6 +7,3 @@ long double cimagl(long double complex z) {
 long double creall(long double complex z) {
     return __real__(z);
 }
-
-
-}
diff --git a/options/ansi/meson.build b/options/ansi/meson.build
index ff8b21ced9..fa1efd1fc2 100644
--- a/options/ansi/meson.build
+++ b/options/ansi/meson.build
@@ -6,7 +6,7 @@ endif
 ansi_sources = files(
 	'generic/stdlib-stubs.cpp',
 	'generic/assert-stubs.cpp',
-	'generic/complex-stubs.cpp',
+	'generic/complex-stubs.c',
 
 	'generic/complex/csqrt.c',
 	'generic/complex/csinhf.c',