diff --git a/GPL/DemanglerGnu/src/demangler_gnu_v2_33_1/c/cxxfilt.c b/GPL/DemanglerGnu/src/demangler_gnu_v2_33_1/c/cxxfilt.c
index 35d25a3979..8a277e17a3 100644
--- a/GPL/DemanglerGnu/src/demangler_gnu_v2_33_1/c/cxxfilt.c
+++ b/GPL/DemanglerGnu/src/demangler_gnu_v2_33_1/c/cxxfilt.c
@@ -29,6 +29,9 @@
    
 */
 
+#include <stdlib.h>
+#include <string.h>
+
 #include "libiberty.h"
 #include "demangle.h"
 #include "getopt.h"