diff --git a/Makefile.am b/Makefile.am
index 2a8ce0e..a8b64d0 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -270,6 +270,7 @@ libcglm_la_SOURCES=\
     src/bezier.c \
     src/ray.c \
     src/affine2d.c \
+    src/aabb2d.c \
     src/clipspace/ortho_lh_no.c \
     src/clipspace/ortho_lh_zo.c \
     src/clipspace/ortho_rh_no.c \