diff --git a/fggl/phys/bullet/CMakeLists.txt b/fggl/phys/bullet/CMakeLists.txt
index 6c5ca9e498a335fe6ce0b3d1a65a2cb95a59d2c2..05a92dfca921e2098e84502d44171044570e98c4 100644
--- a/fggl/phys/bullet/CMakeLists.txt
+++ b/fggl/phys/bullet/CMakeLists.txt
@@ -11,7 +11,7 @@ else()
     else()
         # FIXME: this shouldn't be necessary, for modern cmake, linking the libraries should be enough
         target_compile_definitions(fggl PUBLIC ${BULLET_DEFINITIONS})
-        target_include_directories(fggl PUBLIC ${BULLET_INCLUDE_DIRS})
+        target_include_directories(fggl PUBLIC ${BULLET_INCLUDE_DIR})
         target_link_libraries(fggl PUBLIC ${BULLET_LIBRARIES})
     endif()