diff --git a/grid/Pegasus/mPresentation.c b/grid/Pegasus/mPresentation.c
index 72da6be7..e059e652 100644
--- a/grid/Pegasus/mPresentation.c
+++ b/grid/Pegasus/mPresentation.c
@@ -14,6 +14,7 @@ Version  Developer        Date     Change
 #include <stdlib.h>
 #include <unistd.h>
 #include <strings.h>
+#include <string.h>
 
 #define MAXLEN 20000