diff --git a/ApplicationCode/CMakeLists.txt b/ApplicationCode/CMakeLists.txt
index eb120d625d..cfabd6f0b7 100644
--- a/ApplicationCode/CMakeLists.txt
+++ b/ApplicationCode/CMakeLists.txt
@@ -306,8 +306,7 @@ set( LINK_LIBRARIES
 
 # According to ivarun this is needed on OpenSuse, and Fedora. See: https://github.com/OPM/ResInsight/pull/7
 if (${CMAKE_SYSTEM_NAME} MATCHES "Linux")
-    set ( EXTERNAL_LINK_LIBRARIES
-        ${EXTERNAL_LINK_LIBRARIES}
+    list(APPEND EXTERNAL_LINK_LIBRARIES
         rt
     )
 endif()
diff --git a/CMakeLists.txt b/CMakeLists.txt
index e80039866a..06a7b7a4a9 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -168,7 +168,7 @@ if (RESINSIGHT_USE_HDF5)
 		    add_definitions(${HDF5_DEFINITIONS})
 		    include_directories(${HDF5_INCLUDE_DIRS})
 
-		    list(APPEND THIRD_PARTY_LIBRARIES
+		    list(APPEND EXTERNAL_LINK_LIBRARIES
 		        ${HDF5_LIBRARIES}
 		    )