diff --git a/CMakeLists.txt b/CMakeLists.txt
index 4fc4fda..b4e8c8c 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -77,8 +77,8 @@ add_library(BillySheet SHARED ${SOURCES})
 target_include_directories(BillySheet
         PUBLIC
         $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
-        $<INSTALL_INTERFACE:${CMAKE_INSTALL_INDLUDEDIR}/billySheet>
 )
+target_include_directories(BillySheet INTERFACE $<INSTALL_INTERFACE:include/billySheet>)
 
 set_target_properties(BillySheet PROPERTIES
         CXX_STANDARD 17
@@ -89,7 +89,7 @@ set_target_properties(BillySheet PROPERTIES
         PUBLIC_HEADER "include/billy_objects.hpp;include/character_sheet.hpp;include/generic_object.hpp;include/characteristic.hpp"
 )
 
-target_compile_definitions(BillySheet PUBLIC
+target_compile_definitions(BillySheet PRIVATE
         $<$<CONFIG:Debug>:_GLIBCXX_DEBUG>
 )