diff --git a/packages/cyclone/scheme-inexact.c.patch b/packages/cyclone/scheme-inexact.c.patch
new file mode 100644
index 000000000000000..daaf23ec7e39713
--- /dev/null
+++ b/packages/cyclone/scheme-inexact.c.patch
@@ -0,0 +1,12 @@
+diff --git a/scheme/inexact.c b/scheme/inexact.c
+index 3fb6a83b..32137b9d 100644
+--- a/scheme/inexact.c
++++ b/scheme/inexact.c
+@@ -110,6 +110,7 @@ if (obj_is_not_closure(clo)) { \
+  }}
+ 
+ #include "cyclone/types.h"
++_Complex double clog(_Complex double);
+ object __glo_lib_91init_117schemeinexact_scheme_inexact = NULL;
+ object __glo_atan_scheme_inexact = NULL;
+ object __glo_atan1_scheme_inexact = NULL;