diff --git a/src/coff/coff.c b/src/coff/coff.c
index 3e3bf852..a8a1fb57 100644
--- a/src/coff/coff.c
+++ b/src/coff/coff.c
@@ -229,19 +229,12 @@ coff_pick_reloc_value_x64(COFF_Reloc_X64 type,
     reloc_value_size = 4;
     reloc_value      = symbol_section_offset;
   } break;
-  case COFF_Reloc_X64_SecRel7: {
-    NotImplemented;
-  } break;
-  case COFF_Reloc_X64_Token: {
-    NotImplemented;
-  } break;
-  case COFF_Reloc_X64_SRel32: {
-    NotImplemented;
-  } break;
-  case COFF_Reloc_X64_Pair: {
-    NotImplemented;
-  } break;
-  case COFF_Reloc_X64_SSpan32: {
+  case COFF_Reloc_X64_SecRel7:
+  case COFF_Reloc_X64_Token:
+  case COFF_Reloc_X64_SRel32:
+  case COFF_Reloc_X64_Pair:
+  case COFF_Reloc_X64_SSpan32:
+  case COFF_Reloc_X64_Unknown_11: {
     NotImplemented;
   } break;
   }
diff --git a/src/coff/coff.h b/src/coff/coff.h
index 1127b1db..2dd187b6 100644
--- a/src/coff/coff.h
+++ b/src/coff/coff.h
@@ -367,23 +367,24 @@ typedef U16 COFF_RelocType;
 typedef COFF_RelocType COFF_Reloc_X64;
 enum
 {
-  COFF_Reloc_X64_Abs      = 0x0,
-  COFF_Reloc_X64_Addr64   = 0x1,
-  COFF_Reloc_X64_Addr32   = 0x2,
-  COFF_Reloc_X64_Addr32Nb = 0x3,  // NB => No Base
-  COFF_Reloc_X64_Rel32    = 0x4,
-  COFF_Reloc_X64_Rel32_1  = 0x5,
-  COFF_Reloc_X64_Rel32_2  = 0x6,
-  COFF_Reloc_X64_Rel32_3  = 0x7,
-  COFF_Reloc_X64_Rel32_4  = 0x8,
-  COFF_Reloc_X64_Rel32_5  = 0x9,
-  COFF_Reloc_X64_Section  = 0xA,
-  COFF_Reloc_X64_SecRel   = 0xB,
-  COFF_Reloc_X64_SecRel7  = 0xC,  // TODO(nick): MSDN doesn't specify size for CLR token
-  COFF_Reloc_X64_Token    = 0xD,
-  COFF_Reloc_X64_SRel32   = 0xE,  // TODO(nick): MSDN doesn't specify size for PAIR
-  COFF_Reloc_X64_Pair     = 0xF,
-  COFF_Reloc_X64_SSpan32  = 0x10
+  COFF_Reloc_X64_Abs        = 0x0,
+  COFF_Reloc_X64_Addr64     = 0x1,
+  COFF_Reloc_X64_Addr32     = 0x2,
+  COFF_Reloc_X64_Addr32Nb   = 0x3,  // NB => No Base
+  COFF_Reloc_X64_Rel32      = 0x4,
+  COFF_Reloc_X64_Rel32_1    = 0x5,
+  COFF_Reloc_X64_Rel32_2    = 0x6,
+  COFF_Reloc_X64_Rel32_3    = 0x7,
+  COFF_Reloc_X64_Rel32_4    = 0x8,
+  COFF_Reloc_X64_Rel32_5    = 0x9,
+  COFF_Reloc_X64_Section    = 0xA,
+  COFF_Reloc_X64_SecRel     = 0xB,
+  COFF_Reloc_X64_SecRel7    = 0xC,  // TODO(nick): MSDN doesn't specify size for CLR token
+  COFF_Reloc_X64_Token      = 0xD,
+  COFF_Reloc_X64_SRel32     = 0xE,  // TODO(nick): MSDN doesn't specify size for PAIR
+  COFF_Reloc_X64_Pair       = 0xF,
+  COFF_Reloc_X64_SSpan32    = 0x10,
+  COFF_Reloc_X64_Unknown_11 = 0x11,
 };
 
 typedef COFF_RelocType COFF_Reloc_X86;