diff --git a/src/mbyte.c b/src/mbyte.c
index 5f82edf..7fdd44d 100644
--- a/src/mbyte.c
+++ b/src/mbyte.c
@@ -4317,6 +4317,8 @@
 							    .VirtualAddress);
     for (; pImpDesc->FirstThunk; ++pImpDesc)
     {
+	if (!pImpDesc->OriginalFirstThunk)
+	    continue;
 	pIAT = (PIMAGE_THUNK_DATA)(pImage + pImpDesc->FirstThunk);
 	pINT = (PIMAGE_THUNK_DATA)(pImage + pImpDesc->OriginalFirstThunk);
 	for (; pIAT->u1.Function; ++pIAT, ++pINT)