1diff --git a/glymur/config.py b/glymur/config.py
2index 962e299..dab44ba 100644
3--- a/glymur/config.py
4+++ b/glymur/config.py
5@@ -53,6 +53,11 @@ def _determine_full_path(libname):
6 if path is not None:
7 return path
8
9+ if libname == "openjp2":
10+ return "@openjp2_lib@"
11+ if libname == "tiff":
12+ return "@tiff_lib@"
13+
14 # No joy on config file. Cygwin? Cygwin is a bit of an odd case.
15 if platform.system().startswith('CYGWIN'):
16 g = pathlib.Path('/usr/bin').glob('cygopenjp2*.dll')