fix: compilation failed #218

Job	Run time
Run unit tests without uci support	1m 15s
Run integration tests	26s
Run unit tests	46s
Build aarch64_cortex-a53	8m 42s
Build aarch64_cortex-a72	9m 18s
Build aarch64_generic	9m 3s
Build arm_cortex-a7_neon-vfpv4	9m 24s
Build arm_cortex-a9_vfpv3-d16	8m 38s
Build arm_cortex-a15_neon-vfpv4	8m 37s
Build i386_pentium4	9m 16s
Build i386_pentium-mmx	9m 9s
Build mips_24kc	8m 35s
Build mipsel_24kc	8m 32s
Build powerpc_464fp	8m 31s
Build powerpc_8548	8m 41s
Build x86_64	9m 12s
	1h 58m 5s

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