diff --git a/intern/cycles/kernel/device/cpu/compat.h b/intern/cycles/kernel/device/cpu/compat.h
index 44be94238b4..b0ee6a08736 100644
--- a/intern/cycles/kernel/device/cpu/compat.h
+++ b/intern/cycles/kernel/device/cpu/compat.h
@@ -12,14 +12,6 @@
 #  pragma GCC diagnostic ignored "-Wuninitialized"
 #endif
 
-/* On x86_64, versions of GLIBC < 2.16 have an issue where `expf` is
- * much slower than the double version. This was fixed in GLIBC 2.16. */
-#if !defined(__KERNEL_GPU__) && defined(__x86_64__) && defined(__x86_64__) && \
-    defined(__GNU_LIBRARY__) && defined(__GLIBC__) && defined(__GLIBC_MINOR__) && \
-    (__GLIBC__ <= 2 && __GLIBC_MINOR__ < 16)
-#  define expf(x) ((float)exp((double)(x)))
-#endif
-
 CCL_NAMESPACE_BEGIN
 
 /* Assertions inside the kernel only work for the CPU device, so we wrap it in