diff --git a/python_tools/void_python_tools/backend/launchers.py b/python_tools/void_python_tools/backend/launchers.py
index c603e58..47d9120 100644
--- a/python_tools/void_python_tools/backend/launchers.py
+++ b/python_tools/void_python_tools/backend/launchers.py
@@ -339,6 +339,8 @@ def launchZobov(sample, binPath, zobovDir=None, logDir=None, continueRun=None,
   else:
     maskIndex = -1
     maxDen = 0.2
+    if numZobovDivisions == 1:
+      print "  WARNING! You are using a single ZOBOV division with a simulation. Periodic boundaries will not be respected!"
 
   if not (continueRun and jobSuccessful(logFile, "Done!\n")):
     for fileName in glob.glob(zobovDir+"/part._"+sampleName+".*"):
diff --git a/zobov/vozinit.c b/zobov/vozinit.c
index 223e0e4..21fcac9 100644
--- a/zobov/vozinit.c
+++ b/zobov/vozinit.c
@@ -59,9 +59,9 @@ int main(int argc, char *argv[]) {
     printf("That's no number of divisions; try again.\n");
     exit(0);
   }
-  if (numdiv < 2) {
-    printf("Cannot have a number of divisions less than 2.  Resetting to 2:\n");
-    numdiv = 2;
+  if (numdiv < 1) {
+    printf("Cannot have a number of divisions less than 1.  Resetting to 1:\n");
+    numdiv = 1;
   }
 
   suffix = argv[5];
diff --git a/zobov/voztie.c b/zobov/voztie.c
index 5a15448..0f67b98 100644
--- a/zobov/voztie.c
+++ b/zobov/voztie.c
@@ -50,10 +50,11 @@ int main(int argc, char *argv[]) {
     printf("That's no number of divisions; try again.\n");
     exit(0);
   }
-  if (numdiv < 2) {
-    printf("Cannot have a number of divisions less than 2.  Resetting to 2:\n");
-    numdiv = 2;
+  if (numdiv < 1) {
+    printf("Cannot have a number of divisions less than 1.  Resetting to 1:\n");
+    numdiv = 1;
   }
+
   suffix = argv[2];
   outDir = argv[3];
   if (sscanf(argv[4],"%d",&mockIndex) != 1) {