diff --git a/src/math/bigfix/CMakeLists.txt b/src/math/bigfix/CMakeLists.txt
new file mode 100644
index 000000000..cc9f23aca
--- /dev/null
+++ b/src/math/bigfix/CMakeLists.txt
@@ -0,0 +1,8 @@
+z3_add_component(bigfix
+  SOURCES
+    Hacl_Bignum.c
+    Hacl_Bignum256.c
+    u256.cpp
+  COMPONENT_DEPENDENCIES
+    util  
+)