diff --git a/sljit_src/sljitConfigInternal.h b/sljit_src/sljitConfigInternal.h
index 701bd4fc..3ae944ef 100644
--- a/sljit_src/sljitConfigInternal.h
+++ b/sljit_src/sljitConfigInternal.h
@@ -781,6 +781,7 @@ SLJIT_API_FUNC_ATTRIBUTE sljit_sw sljit_exec_offset(void *code);
 #define SLJIT_LOCALS_OFFSET_BASE 0
 #define SLJIT_MASKED_SHIFT 1
 #define SLJIT_MASKED_SHIFT32 1
+#define SLJIT_UPPER_BITS_SIGN_EXTENDED 1
 
 #elif (defined SLJIT_CONFIG_UNSUPPORTED && SLJIT_CONFIG_UNSUPPORTED)