diff --git a/src/MagnumPlugins/MagnumFont/CMakeLists.txt b/src/MagnumPlugins/MagnumFont/CMakeLists.txt
index e91405250..e77f1674e 100644
--- a/src/MagnumPlugins/MagnumFont/CMakeLists.txt
+++ b/src/MagnumPlugins/MagnumFont/CMakeLists.txt
@@ -30,7 +30,9 @@ set(MagnumFont_HEADERS
     MagnumFont.h)
 
 # Objects shared between plugin and test library
-add_library(MagnumFontObjects OBJECT ${MagnumFont_SRCS})
+add_library(MagnumFontObjects OBJECT
+    ${MagnumFont_SRCS}
+    ${MagnumFont_HEADERS})
 if(NOT BUILD_PLUGINS_STATIC OR BUILD_STATIC_PIC)
     set_target_properties(MagnumFontObjects PROPERTIES POSITION_INDEPENDENT_CODE ON)
 endif()
diff --git a/src/MagnumPlugins/MagnumFontConverter/CMakeLists.txt b/src/MagnumPlugins/MagnumFontConverter/CMakeLists.txt
index af66c6084..0fd471cd2 100644
--- a/src/MagnumPlugins/MagnumFontConverter/CMakeLists.txt
+++ b/src/MagnumPlugins/MagnumFontConverter/CMakeLists.txt
@@ -30,7 +30,9 @@ set(MagnumFontConverter_HEADERS
     MagnumFontConverter.h)
 
 # Objects shared between plugin and test library
-add_library(MagnumFontConverterObjects OBJECT ${MagnumFontConverter_SRCS})
+add_library(MagnumFontConverterObjects OBJECT
+    ${MagnumFontConverter_SRCS}
+    ${MagnumFontConverter_HEADERS})
 if(NOT BUILD_PLUGINS_STATIC OR BUILD_STATIC_PIC)
     set_target_properties(MagnumFontConverterObjects PROPERTIES POSITION_INDEPENDENT_CODE ON)
 endif()