diff --git a/ports/rttr/disable-unit-tests.patch b/ports/rttr/disable-unit-tests.patch
new file mode 100644
index 0000000000..b27f01661f
--- /dev/null
+++ b/ports/rttr/disable-unit-tests.patch
@@ -0,0 +1,14 @@
+diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
+index b9fd698..bcaebfe 100644
+--- a/src/CMakeLists.txt
++++ b/src/CMakeLists.txt
+@@ -31,7 +31,9 @@
+ #############################################
+ 
+ add_subdirectory (rttr)
++if(UNIT_TESTS)
+ add_subdirectory (unit_tests)
++endif()
+ 
+ if (${BUILD_BENCHMARKS})
+     add_subdirectory (benchmarks)
diff --git a/ports/rttr/portfile.cmake b/ports/rttr/portfile.cmake
index b590b78732..f3b3eafb9b 100644
--- a/ports/rttr/portfile.cmake
+++ b/ports/rttr/portfile.cmake
@@ -14,7 +14,9 @@ vcpkg_extract_source_archive(${ARCHIVE})
 
 vcpkg_apply_patches(
     SOURCE_PATH ${CURRENT_BUILDTREES_DIR}/src/rttr-0.9.5-src
-    PATCHES "${CMAKE_CURRENT_LIST_DIR}/fix-directory-output.patch"
+    PATCHES
+        "${CMAKE_CURRENT_LIST_DIR}/fix-directory-output.patch"
+        "${CMAKE_CURRENT_LIST_DIR}/disable-unit-tests.patch"
 )
 
 vcpkg_configure_cmake(