ParMGridGen/IMParMetis-2.0/ParMETISLib/util.c | 4 ++--
 ParMGridGen/ParLib/util.c                     | 4 ++--
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/ParMGridGen/IMParMetis-2.0/ParMETISLib/util.c b/ParMGridGen/IMParMetis-2.0/ParMETISLib/util.c
index d0dfc91..941f68e 100644
--- a/ParMGridGen/IMParMetis-2.0/ParMETISLib/util.c
+++ b/ParMGridGen/IMParMetis-2.0/ParMETISLib/util.c
@@ -25,7 +25,7 @@ void errexit(char *f_str,...)
 
   sprintf(out2, "Error! %s", out1);
 
-  fprintf(stdout, out2);
+  fprintf(stdout, "%s", out2);
   fflush(stdout);
 
   abort();
@@ -46,7 +46,7 @@ void myprintf(CtrlType *ctrl, char *f_str,...)
 
   sprintf(out2, "[%2d] %s", ctrl->mype, out1);
 
-  fprintf(stdout, out2);
+  fprintf(stdout, "%s", out2);
   fflush(stdout);
 
 }
diff --git a/ParMGridGen/ParLib/util.c b/ParMGridGen/ParLib/util.c
index 9b8290d..c212b60 100644
--- a/ParMGridGen/ParLib/util.c
+++ b/ParMGridGen/ParLib/util.c
@@ -25,7 +25,7 @@ void MGriderrexit(char *f_str,...)
 
   sprintf(out2, "Error! %s", out1);
 
-  fprintf(stdout, out2);
+  fprintf(stdout, "%s", out2);
   fflush(stdout);
 
   abort();
@@ -46,7 +46,7 @@ void MGridmyprintf(MGridCtrlType *ctrl, char *f_str,...)
 
   sprintf(out2, "[%2d] %s", ctrl->mype, out1);
 
-  fprintf(stdout, out2);
+  fprintf(stdout, "%s", out2);
   fflush(stdout);
 
 }