diff --git a/src/compiler/sema_casts.c b/src/compiler/sema_casts.c
index 321c29a9d..a04f0caea 100644
--- a/src/compiler/sema_casts.c
+++ b/src/compiler/sema_casts.c
@@ -6,8 +6,6 @@
 // implicit conversions. C3 has a fairly complex set of rules,
 // which makes this code somewhat lengthy.
 
-#include <tgmath.h>
-
 #include "sema_internal.h"
 
 typedef struct