diff --git a/dev-libs/olm/files/olmlib.patch b/dev-libs/olm/files/olmlib.patch
new file mode 100644
index 0000000..e18e7a2
--- /dev/null
+++ b/dev-libs/olm/files/olmlib.patch
@@ -0,0 +1,12 @@
+diff --git a/python/olm_build.py b/python/olm_build.py
+index 0606337..1032da0 100644
+--- a/python/olm_build.py
++++ b/python/olm_build.py
+@@ -46,6 +46,7 @@ ffibuilder.set_source(
+         #include <olm/sas.h>
+     """,
+     libraries=["olm"],
++    library_dirs = ["../lib64"],
+     extra_compile_args=compile_args,
+     extra_link_args=link_args)
+ 
diff --git a/dev-libs/olm/olm-3.1.5-r1.ebuild b/dev-libs/olm/olm-3.1.5-r1.ebuild
index 6a49278..f1440cd 100644
--- a/dev-libs/olm/olm-3.1.5-r1.ebuild
+++ b/dev-libs/olm/olm-3.1.5-r1.ebuild
@@ -30,6 +30,10 @@ DEPEND="
 	)
 "
 
+CMAKE_IN_SOURCE_BUILD=1
+
+PATCHES=( "${FILESDIR}/olmlib.patch" )
+
 src_prepare() {
 	cmake_src_prepare
 	use python && (cd python; distutils-r1_src_prepare)