diff --git a/elf.h b/elf.h
index a40c736..cce2f9d 100644
--- a/elf.h
+++ b/elf.h
@@ -2895,6 +2895,10 @@ typedef Elf32_Addr Elf32_Conflict;
 #define R_X86_64_TLSDESC        36	/* TLS descriptor.  */
 #define R_X86_64_IRELATIVE	37	/* Adjust indirectly by program base */
 #define R_X86_64_RELATIVE64	38	/* 64-bit adjust by program base */
+#define R_X86_64_GOTPCRELX	41	/* like GOTPCREL, but optionally with
+					   linker optimizations */
+#define R_X86_64_REX_GOTPCRELX	42      /* like GOTPCRELX, but a REX prefix
+					   is present */
 
 #define R_X86_64_NUM		39
 
diff --git a/tccelf.c b/tccelf.c
index fdb549a..e5cd01b 100644
--- a/tccelf.c
+++ b/tccelf.c
@@ -941,8 +941,8 @@ ST_FUNC void relocate_section(TCCState *s1, Section *s)
             write64le(ptr, val - rel->r_addend);
             break;
         case R_X86_64_GOTPCREL:
-	case 41 /* R_X86_64_GOTPCRELX */:
-	case 42 /* R_X86_64_REX_GOTPCRELX */:
+	case R_X86_64_GOTPCRELX:
+	case R_X86_64_REX_GOTPCRELX:
             write32le(ptr, read32le(ptr) +
                       (s1->got->sh_addr - addr +
                        s1->sym_attrs[sym_index].got_offset - 4));
@@ -1424,8 +1424,8 @@ ST_FUNC void build_got_entries(TCCState *s1)
             case R_X86_64_GOT32:
             case R_X86_64_GOTTPOFF:
             case R_X86_64_GOTPCREL:
-	    case 41 /* R_X86_64_GOTPCRELX */:
-	    case 42 /* R_X86_64_REX_GOTPCRELX */:
+	    case R_X86_64_GOTPCRELX:
+	    case R_X86_64_REX_GOTPCRELX:
             case R_X86_64_PLT32:
                 sym_index = ELFW(R_SYM)(rel->r_info);
                 sym = &((ElfW(Sym) *)symtab_section->data)[sym_index];
@@ -1441,7 +1441,9 @@ ST_FUNC void build_got_entries(TCCState *s1)
                     sym = &((ElfW(Sym) *)symtab_section->data)[sym_index];
                 }
                 if (type == R_X86_64_GOT32 || type == R_X86_64_GOTPCREL ||
-                    type == R_X86_64_PLT32 || type == 41 || type == 42) {
+		    type == R_X86_64_GOTPCRELX ||
+		    type == R_X86_64_REX_GOTPCRELX ||
+                    type == R_X86_64_PLT32) {
 		    unsigned long ofs;
                     /* look at the symbol got offset. If none, then add one */
 		    if (type == R_X86_64_PLT32)
@@ -1773,8 +1775,8 @@ ST_FUNC void fill_got(TCCState *s1)
             switch (ELFW(R_TYPE) (rel->r_info)) {
                 case R_X86_64_GOT32:
                 case R_X86_64_GOTPCREL:
-		case 41 /* R_X86_64_GOTPCRELX */:
-		case 42 /* R_X86_64_REX_GOTPCRELX */:
+		case R_X86_64_GOTPCRELX:
+		case R_X86_64_REX_GOTPCRELX:
                 case R_X86_64_PLT32:
                     fill_got_entry(s1, rel);
                     break;