diff --git a/bdshemu/bdshemu.c b/bdshemu/bdshemu.c
index f8f0f2d..faf1652 100644
--- a/bdshemu/bdshemu.c
+++ b/bdshemu/bdshemu.c
@@ -1363,6 +1363,9 @@ ShemuSetOperandValue(
 
         case ND_REG_FLG:
             Context->Registers.RegFlags = ND_TRIM(Value->Size, Value->Value.Qwords[0]);
+            // Handle reserved bits.
+            Context->Registers.RegFlags |= (1ULL << 1);
+            Context->Registers.RegFlags &= ~((1ULL << 3) | (1ULL << 5) | (1ULL << 15));
             break;
 
         case ND_REG_CR:
diff --git a/inc/version.h b/inc/version.h
index eba02c9..3389f37 100644
--- a/inc/version.h
+++ b/inc/version.h
@@ -12,6 +12,6 @@
 // bdshemu depends on bddisasm. It cannot be used without it.
 #define SHEMU_VERSION_MAJOR         1
 #define SHEMU_VERSION_MINOR         1
-#define SHEMU_VERSION_REVISION      12
+#define SHEMU_VERSION_REVISION      13
 
 #endif // DISASM_VER_H