diff --git a/config.h.cmake b/config.h.cmake
index 2f382cc73..b2daa5979 100644
--- a/config.h.cmake
+++ b/config.h.cmake
@@ -1153,6 +1153,7 @@ __END_DECLS
 #endif
 #ifdef __cplusplus
 extern "C"
+{
 #endif
 #if !defined(HAVE_VSNPRINTF_PROTO)
 int vsnprintf(char *str, size_t n, char const *fmt, va_list ap);
@@ -1161,7 +1162,7 @@ int vsnprintf(char *str, size_t n, char const *fmt, va_list ap);
 int snprintf(char *str, size_t n, char const *fmt, ...);
 #endif
 #ifdef __cplusplus
-extern "C"
+}
 #endif
 #endif
 
@@ -1222,7 +1223,10 @@ extern "C"
 #define HAVE_SETEUID_FAKE
 #ifdef __cplusplus
 extern "C"
+{
 #endif
 int seteuid(INT32_BASETYPE euid); /* defined in fakes.c */
+#ifdef __cplusplus
+}
+#endif
 #endif
-