diff --git a/src/gui/imageinfo_ni.cpp b/src/gui/imageinfo_ni.cpp
index 6e029d24f..c689432d0 100644
--- a/src/gui/imageinfo_ni.cpp
+++ b/src/gui/imageinfo_ni.cpp
@@ -549,7 +549,8 @@ int CImageInfoNI::CPU_Percent(_stat *cpu)
 
 	long unsigned int sys_diff = sys_new - sys_old;
 	long unsigned int total_diff = total_new - total_old;
-
+	if(!total_diff)
+		total_diff = 1;
 	long unsigned int percent = ((float) sys_diff / (float) total_diff) * 100;
 
 	if (sys_diff > 1 || total_diff > 1)