--- a/CMakeModules/FindTIFF.cmake
+++ b/CMakeModules/FindTIFF.cmake
@@ -17,6 +17,7 @@
 FIND_PATH(TIFF_INCLUDE_DIR tiff.h
   /usr/local/include
   /usr/include
+  ${SOURCE_BASE_DIR}/tiff-4.0.0beta6/libtiff
   ${SOURCE_BASE_DIR}/tiff-4.0.0beta5/libtiff
   ${SOURCE_BASE_DIR}/tiff-3.8.2/libtiff
   ${SOURCE_BASE_DIR}/tiff-4.0.0alpha/libtiff
@@ -31,6 +32,7 @@
   find_library(TIFF_LIBRARIES
     NAMES libtiff_i
     PATHS /usr/lib /usr/local/lib
+          ${SOURCE_BASE_DIR}/tiff-4.0.0beta6/libtiff
           ${SOURCE_BASE_DIR}/tiff-4.0.0beta5/libtiff
   )
 ELSE(WIN32 AND ${HUGIN_SHARED})
@@ -38,6 +40,7 @@
     WIN32_DEBUG_POSTFIX d
     NAMES tiff libtiff wxtiff
     PATHS /usr/lib /usr/local/lib
+          ${SOURCE_BASE_DIR}/tiff-4.0.0beta6/libtiff
           ${SOURCE_BASE_DIR}/tiff-4.0.0beta5/libtiff
           ${SOURCE_BASE_DIR}/tiff-3.8.2/libtiff
           ${SOURCE_BASE_DIR}/tiff-4.0.0alpha/libtiff