diff --git a/IO/CMakeLists.txt b/IO/CMakeLists.txt
index f97cdad..a09685e 100644
--- a/IO/CMakeLists.txt
+++ b/IO/CMakeLists.txt
@@ -31,4 +31,5 @@ ADD_LIBRARY(TexCompIO
 
 IF( PNG_FOUND )
 	TARGET_LINK_LIBRARIES( TexCompIO ${PNG_LIBRARY} )
+        TARGET_LINK_LIBRARIES( TexCompIO ${ZLIB_LIBRARY} )
 ENDIF()