diff --git a/toolchain/uClibc/uClibc-0.9.30.config b/toolchain/uClibc/uClibc-0.9.30.config
index 10b3619914..469c384776 100644
--- a/toolchain/uClibc/uClibc-0.9.30.config
+++ b/toolchain/uClibc/uClibc-0.9.30.config
@@ -46,6 +46,7 @@ UCLIBC_HAS_FLOATS=y
 UCLIBC_HAS_FPU=y
 DO_C99_MATH=y
 # UCLIBC_HAS_FENV is not set
+UCLIBC_HAS_LONG_DOUBLE_MATH=y
 KERNEL_HEADERS="/usr/src/linux/include"
 HAVE_DOT_CONFIG=y