diff --git a/CMakeLists.txt b/CMakeLists.txt
index 819c36f..2f1ba1c 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -22,7 +22,7 @@ if(CMAKE_INSTALL_PREFIX_INITIALIZED_TO_DEFAULT)
   set(CMAKE_INSTALL_PREFIX /usr)
 endif()
 
-add_library(json11 json11.cpp)
+add_library(json11 STATIC json11.cpp)
 target_include_directories(json11 PUBLIC ${CMAKE_CURRENT_SOURCE_DIR})
 target_compile_options(json11
   PRIVATE -fPIC -fno-rtti -fno-exceptions -Wall)
@@ -52,6 +52,11 @@ if (JSON11_BUILD_TESTS)
   target_link_libraries(json11_test json11)
 endif()
 
-install(TARGETS json11 DESTINATION lib/${CMAKE_LIBRARY_ARCHITECTURE})
-install(FILES "${CMAKE_CURRENT_SOURCE_DIR}/json11.hpp" DESTINATION include/${CMAKE_LIBRARY_ARCHITECTURE})
-install(FILES "${CMAKE_CURRENT_BINARY_DIR}/json11.pc" DESTINATION lib/${CMAKE_LIBRARY_ARCHITECTURE}/pkgconfig)
+# We only need to install json11 if we're building the mission plugin
+# statically because in that case libjson11.a does not get included in
+# dronecore_mission.a.
+if (PLUGIN_LIBRARY_TYPE STREQUAL "STATIC")
+    install(TARGETS json11 DESTINATION lib/${CMAKE_LIBRARY_ARCHITECTURE})
+    install(FILES "${CMAKE_CURRENT_SOURCE_DIR}/json11.hpp" DESTINATION include/${CMAKE_LIBRARY_ARCHITECTURE})
+    install(FILES "${CMAKE_CURRENT_BINARY_DIR}/json11.pc" DESTINATION lib/${CMAKE_LIBRARY_ARCHITECTURE}/pkgconfig)
+endif()