diff --git a/src/sigar_ptql.c b/src/sigar_ptql.c
index 9c2e59f6..98201c9f 100644
--- a/src/sigar_ptql.c
+++ b/src/sigar_ptql.c
@@ -691,6 +691,7 @@ enum {
 #endif
 
 #ifndef WIN32
+#include <sys/stat.h>
 int sigar_sudo_file2str(const char *fname, char *buffer, int buflen)
 {
     FILE *fp;