diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index e9d07fc4..2a1fa25a 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -22,10 +22,6 @@ link_directories(${CMAKE_BINARY_DIR}/bittybuzz)
 #
 include(${INCLUDE_FILES_CMAKE}/BittyBuzzConfig.cmake)
 
-if (BBZ_USE_FLOAT)
-    add_definitions(-DBBZ_USE_FLOAT=1)
-endif (BBZ_USE_FLOAT)
-
 #
 # Host compiler values
 #
diff --git a/src/bittybuzz/config.h.in b/src/bittybuzz/config.h.in
index e4ad18bb..70ab17a9 100644
--- a/src/bittybuzz/config.h.in
+++ b/src/bittybuzz/config.h.in
@@ -137,6 +137,11 @@
  */
 #cmakedefine BBZ_BYTEWISE_ASSIGNMENT
 
+/**
+ * @brief Whether to floats
+ */
+#cmakedefine BBZ_USE_FLOAT
+
 /**
  * @brief Whether to use floats for the neighbor's range and bearing
  * measurments.