Index: ctlrender/tiff_file.cc
--- ctlrender/tiff_file.cc.orig
+++ ctlrender/tiff_file.cc
@@ -66,7 +66,7 @@
 #ifdef _WIN32
   #include <malloc.h>
 #else
-  #include <alloca.h>
+  #include <stdlib.h>
 #endif
 
 void tiff_read_multiplane(TIFF *t, float scale, ctl::dpx::fb<float> * pixels);
