diff --git a/TactilityC/Source/tt_init.cpp b/TactilityC/Source/tt_init.cpp
index 9ba61b748..296b9f68b 100644
--- a/TactilityC/Source/tt_init.cpp
+++ b/TactilityC/Source/tt_init.cpp
@@ -72,6 +72,7 @@ const esp_elfsym main_symbols[] {
     ESP_ELFSYM_EXPORT(rand),
     ESP_ELFSYM_EXPORT(srand),
     ESP_ELFSYM_EXPORT(rand_r),
+    ESP_ELFSYM_EXPORT(atof),
     ESP_ELFSYM_EXPORT(atoi),
     ESP_ELFSYM_EXPORT(atol),
     ESP_ELFSYM_EXPORT(system),