diff --git a/cmake/FindAEC.cmake b/cmake/FindAEC.cmake
index ae1d7ffad..2dde3e1cb 100644
--- a/cmake/FindAEC.cmake
+++ b/cmake/FindAEC.cmake
@@ -18,14 +18,18 @@
 #
 #  AEC_DIR          - prefix path of the AEC installation
 #  AEC_PATH         - prefix path of the AEC installation
+#  LIBAEC_DIR
+#  libaec_DIR
+#  LIBAEC_PATH
+#  libaec_PATH
 
 find_path( AEC_INCLUDE_DIR szlib.h
-           PATHS ${AEC_DIR} ${AEC_PATH} ENV AEC_DIR ENV AEC_PATH
+           PATHS ${AEC_DIR} ${AEC_PATH} ${LIBAEC_DIR} ${libaec_DIR} ${LIBAEC_PATH} ${libaec_PATH} ENV AEC_DIR ENV AEC_PATH ENV LIBAEC_DIR ENV libaec_DIR ENV LIBAEC_PATH ENV libaec_PATH
            PATH_SUFFIXES include include/aec NO_DEFAULT_PATH )
 find_path( AEC_INCLUDE_DIR szlib.h PATH_SUFFIXES include include/aec )
 
 find_library( AEC_LIBRARY  NAMES aec
-              PATHS ${AEC_DIR} ${AEC_PATH} ENV AEC_DIR ENV AEC_PATH
+              PATHS ${AEC_DIR} ${AEC_PATH} ${LIBAEC_DIR} ${libaec_DIR} ${LIBAEC_PATH} ${libaec_PATH} ENV AEC_DIR ENV AEC_PATH ENV LIBAEC_DIR ENV libaec_DIR ENV LIBAEC_PATH ENV libaec_PATH
               PATH_SUFFIXES lib lib64 lib/aec lib64/aec NO_DEFAULT_PATH )
 find_library( AEC_LIBRARY NAMES aec PATH_SUFFIXES lib lib64 lib/aec lib64/aec )