diff --git a/pdfio-file.c b/pdfio-file.c
index d09b1d0..09e192d 100644
--- a/pdfio-file.c
+++ b/pdfio-file.c
@@ -285,6 +285,10 @@ pdfioFileCreateObj(
   _pdfio_value_t	value;		// Object value
 
 
+  // Range check input...
+  if (!pdf || !dict)
+    return (NULL);
+
   value.type       = PDFIO_VALTYPE_DICT;
   value.value.dict = dict;
 
@@ -372,6 +376,9 @@ pdfioFileCreatePage(pdfio_file_t *pdf,	// I - PDF file
   else
     dict = pdfioDictCreate(pdf);
 
+  if (!dict)
+    return (NULL);
+
   // Make sure the page dictionary has all of the required keys...
   if (!_pdfioDictGetValue(dict, "CropBox"))
     pdfioDictSetRect(dict, "CropBox", &pdf->crop_box);