Error compiling netsurf

make: Entering directory '/home/edvard/dev-netsurf/workspace/libwapcaplet'
 COMPILE: src/libwapcaplet.c
src/libwapcaplet.c: In function ‘lwc_intern_string’:
src/libwapcaplet.c:148:16: error: cast between incompatible function types from ‘void * (*)(void * restrict,  const void * restrict,  size_t)’ {aka ‘void * (*)(void * restrict,  const void * restrict,  long unsigned int)’} to ‘void (*)(char * restrict,  const char * restrict,  size_t)’ {aka ‘void (*)(char * restrict,  const char * restrict,  long unsigned int)’} [-Werror=cast-function-type]
       strncmp, (lwc_memcpy)memcpy);
                ^
cc1: all warnings being treated as errors
make: *** [/home/edvard/dev-netsurf/workspace/inst-x86_64-linux-gnu/share/netsurf-buildsystem/makefiles/Makefile.top:585: build-x86_64-linux-gnu-x86_64-linux-gnu-release-lib-static/src_libwapcaplet.o] Error 1
make: Leaving directory '/home/edvard/dev-netsurf/workspace/libwapcaplet'