diff --git a/libc/include/llvm-libc-macros/math-macros.h b/libc/include/llvm-libc-macros/math-macros.h
index 0ceb2c5c8202b..2f05d7544666e 100644
--- a/libc/include/llvm-libc-macros/math-macros.h
+++ b/libc/include/llvm-libc-macros/math-macros.h
@@ -28,7 +28,7 @@
 
 #define HUGE_VAL __builtin_huge_val()
 #define HUGE_VALF __builtin_huge_valf()
-#define INFINITY __builtin_inf()
+#define INFINITY __builtin_inff()
 #define NAN __builtin_nanf("")
 
 #define FP_ILOGB0 (-INT_MAX - 1)