diff --git a/programs/dwg2SVG.c b/programs/dwg2SVG.c
index 6f08eaf1e..f932a36ce 100644
--- a/programs/dwg2SVG.c
+++ b/programs/dwg2SVG.c
@@ -271,7 +271,8 @@ output_TEXT (Dwg_Object *obj)
           obj->index, transform_X (pt.x), transform_Y (pt.y), fontfamily,
           text->height /* fontsize */, entity_color (obj->tio.entity),
           escaped ? escaped : "");
-  free (escaped);
+  if (escaped)
+    free (escaped);
 }
 
 static void
diff --git a/programs/escape.c b/programs/escape.c
index eeaa8f393..988c76a34 100644
--- a/programs/escape.c
+++ b/programs/escape.c
@@ -33,6 +33,8 @@ htmlescape (const char *restrict src, const Dwg_Codepage cp)
     return NULL;
   len = strlen (src) + 10;
   d = (char *)calloc (len, 1);
+  if (!d)
+    return NULL;
   s = (unsigned char *)src;
   dest = d;
   end = dest + len;