diff --git a/soltools/cpp/_getopt.c b/soltools/cpp/_getopt.c
index 4e609bae92de..a5cd4389558b 100644
--- a/soltools/cpp/_getopt.c
+++ b/soltools/cpp/_getopt.c
@@ -20,7 +20,7 @@
 #include <stdio.h>
 #include <string.h>
 
-#include <_getopt.h>
+#include "_getopt.h"
 
 #define EPR                 fprintf(stderr,
 #define ERR(str, chr)       if(opterr) { EPR "%s%c\n", str, chr); }
diff --git a/soltools/cpp/_unix.c b/soltools/cpp/_unix.c
index c42d22b4b586..7d15d57ed45a 100644
--- a/soltools/cpp/_unix.c
+++ b/soltools/cpp/_unix.c
@@ -32,7 +32,7 @@
 #include "cpp.h"
 
 #if defined(MACOSX) || defined(AIX) || defined(_WIN32)
-#include <_getopt.h>
+#include "_getopt.h"
 #else
 #include <getopt.h>
 #endif