diff --git a/Makefile b/Makefile
index 4d415f9..80ecf6f 100644
--- a/Makefile
+++ b/Makefile
@@ -1,6 +1,6 @@
 .PHONY: libtest.o tests/libtest.so libtest.a documentation README.html
 SCHEME=chibi
-VERSION=0.10.6
+VERSION=0.10.7
 CC=gcc
 TMPDIR=.tmp/
 
diff --git a/foreign/c/primitives/chibi/foreign-c.stub b/foreign/c/primitives/chibi/foreign-c.stub
index 0d929f4..f7e0754 100644
--- a/foreign/c/primitives/chibi/foreign-c.stub
+++ b/foreign/c/primitives/chibi/foreign-c.stub
@@ -108,10 +108,10 @@
 (c-declare "sexp is_pointer(struct sexp_struct* object) { if(sexp_cpointerp(object)) { return SEXP_TRUE; } else { return SEXP_FALSE; } }")
 (define-c sexp (pointer? is_pointer) (sexp))
 
-(c-declare "void c_bytevector_u8_set(void* pointer, int offset, uint8_t value) { *(uint8_t*)((char*)pointer + offset) = value; }")
+(c-declare "void c_bytevector_u8_set(void* pointer, int offset, uint8_t value) { *(uint8_t*)((uint8_t*)pointer + offset) = value; }")
 (define-c void (c-bytevector-u8-set! c_bytevector_u8_set) ((maybe-null pointer void*) int uint8_t))
 
-(c-declare "uint8_t c_bytevector_u8_ref (void* pointer, int offset) { return *(uint8_t*)((char*)pointer + offset); }")
+(c-declare "uint8_t c_bytevector_u8_ref (void* pointer, int offset) { return *(uint8_t*)((uint8_t*)pointer + offset); }")
 (define-c uint8_t (c-bytevector-u8-ref c_bytevector_u8_ref) ((maybe-null pointer void*) int))
 
 (c-declare "void c_bytevector_pointer_set (void* pointer, int offset, void* value) { char* p = (char*)pointer + offset; *(char**)p = value; }")