1 files changed, 3 insertions, 2 deletions
diff --git a/src/debug/ee/amd64/amd64walker.cpp b/src/debug/ee/amd64/amd64walker.cpp
index 836d21486e..39e97841b4 100644
--- a/src/debug/ee/amd64/amd64walker.cpp
+++ b/src/debug/ee/amd64/amd64walker.cpp
@@ -131,10 +131,11 @@ void NativeWalker::Decode()
     {
         case 0xff:
         {
-
             BYTE modrm = *ip++;
 
-            _ASSERT(modrm != NULL);
+            // Ignore "inc dword ptr [reg]" instructions
+            if (modrm == 0)
+                break;
             
             BYTE mod = (modrm & 0xC0) >> 6;
             BYTE reg = (modrm & 0x38) >> 3;