diff --git a/JFMC_CalibWriter_wBP.cpp b/JFMC_CalibWriter_wBP.cpp
index 96c3f40..3d26ca9 100644
--- a/JFMC_CalibWriter_wBP.cpp
+++ b/JFMC_CalibWriter_wBP.cpp
@@ -12,6 +12,7 @@
 
 #include <fstream>
 #include <iomanip>
+#include <sys/stat.h>
 
 struct GainMaps
 {
@@ -48,6 +49,10 @@ int main(int argc, char* argv[]) {
   timeinfo = localtime(&rawtime);  
   strftime(date,80,"%Y-%m-%d",timeinfo);
 
+  // create plot directory with permissions drwxrwxr-x
+  sprintf(savename,"plots/M%s/Calib_%s", module_str.c_str(), date);
+  mkdir(savename, S_IRWXU | S_IRWXG | S_IROTH | S_IXOTH);
+
   // CuFluo HG0 dataset
   sprintf(savename,"data/M%s/CuFluo_gain_HG0_M%s.root", module_str.c_str(), module_str.c_str());
   TFile* FL_HG0_file = new TFile((char*)savename,"READ");