--- CMakeLists.txt.initial	2014-10-07 17:16:53.271970273 +0700
+++ CMakeLists.txt	2014-10-07 17:17:01.168867231 +0700
@@ -265,7 +265,7 @@ endif(enable-gsl)
 #	set(MGL_HAVE_LTDL 0)
 #endif(enable-all OR enable-ltdl)
 
-if(enable-hdf4)
+if(enable-hdf4 AND (NOT enable-hdf5))
 	set(MGL_HAVE_HDF4 1)
 	find_library(HDF4_LIB df)
 	find_library(HDF4MF_LIB mfhdf)
@@ -276,9 +276,9 @@ if(enable-hdf4)
 		message(SEND_ERROR "${HDF4_INCLUDE_DIR}")
 		message(SEND_ERROR "Couldn't find HDF4 libraries.")
 	endif(NOT HDF4_LIB OR NOT HDF4MF_LIB OR NOT HDF4_INCLUDE_DIR)
-else(enable-hdf4)
+else(enable-hdf4 AND (NOT enable-hdf5))
 	set(MGL_HAVE_HDF4 0)
-endif(enable-hdf4)
+endif(enable-hdf4 AND (NOT enable-hdf5))
 
 if(enable-hdf5)
 	set(MGL_HAVE_HDF5 1)