diff --git a/lib/CMakeLists.txt b/lib/CMakeLists.txt
index 06f9e50a..281e1f04 100644
--- a/lib/CMakeLists.txt
+++ b/lib/CMakeLists.txt
@@ -94,6 +94,8 @@ if(BUILD_SHARED_LIBS)
   add_library(stxxl SHARED ${LIBSTXXL_SOURCES})
   set_target_properties(stxxl PROPERTIES OUTPUT_NAME "${STXXL_LIBNAME}")
   set_target_properties(stxxl PROPERTIES VERSION "${STXXL_VERSION_STRING}")
+  target_include_directories(stxxl PUBLIC $<INSTALL_INTERFACE:include>)
+
   install(TARGETS stxxl
     EXPORT stxxl-targets
     ARCHIVE DESTINATION ${INSTALL_LIB_DIR}
@@ -104,6 +106,8 @@ if(BUILD_SHARED_LIBS)
     add_library(stxxl_static STATIC ${LIBSTXXL_SOURCES})
     set_target_properties(stxxl_static PROPERTIES OUTPUT_NAME "${STXXL_LIBNAME}")
     set_target_properties(stxxl_static PROPERTIES VERSION "${STXXL_VERSION_STRING}")
+    target_include_directories(stxxl_static PUBLIC $<INSTALL_INTERFACE:include>)
+
     install(TARGETS stxxl_static
       EXPORT stxxl-targets
       ARCHIVE DESTINATION ${INSTALL_LIB_DIR})
@@ -122,6 +126,8 @@ else()
   add_library(stxxl STATIC ${LIBSTXXL_SOURCES})
   set_target_properties(stxxl PROPERTIES OUTPUT_NAME "${STXXL_LIBNAME}")
   set_target_properties(stxxl PROPERTIES VERSION "${STXXL_VERSION_STRING}")
+  target_include_directories(stxxl PUBLIC $<INSTALL_INTERFACE:include>)
+
   install(TARGETS stxxl
     EXPORT stxxl-targets
     ARCHIVE DESTINATION ${INSTALL_LIB_DIR}