diff --git a/src/main/fragment/pwsc1_derefidx_vbuxx=pwsc1_derefidx_vbuxx_minus_vwsc2.asm b/src/main/fragment/pwsc1_derefidx_vbuxx=pwsc1_derefidx_vbuxx_minus_vwsc2.asm
new file mode 100644
index 000000000..330f65bf5
--- /dev/null
+++ b/src/main/fragment/pwsc1_derefidx_vbuxx=pwsc1_derefidx_vbuxx_minus_vwsc2.asm
@@ -0,0 +1,7 @@
+sec
+lda {c1},x
+sbc #<{c2}
+sta {c1},x
+lda {c1}+1,x
+sbc #>{c2}
+sta {c1}+1,x
\ No newline at end of file
diff --git a/src/main/fragment/pwsc1_derefidx_vbuyy=pwsc1_derefidx_vbuyy_minus_vwsc2.asm b/src/main/fragment/pwsc1_derefidx_vbuyy=pwsc1_derefidx_vbuyy_minus_vwsc2.asm
new file mode 100644
index 000000000..614aaf379
--- /dev/null
+++ b/src/main/fragment/pwsc1_derefidx_vbuyy=pwsc1_derefidx_vbuyy_minus_vwsc2.asm
@@ -0,0 +1,7 @@
+sec
+lda {c1},y
+sbc #<{c2}
+sta {c1},y
+lda {c1}+1,y
+sbc #>{c2}
+sta {c1}+1,y
\ No newline at end of file
diff --git a/src/test/java/dk/camelot64/kickc/test/TestFragments.java b/src/test/java/dk/camelot64/kickc/test/TestFragments.java
index ee6093ee5..33d1787a6 100644
--- a/src/test/java/dk/camelot64/kickc/test/TestFragments.java
+++ b/src/test/java/dk/camelot64/kickc/test/TestFragments.java
@@ -139,6 +139,8 @@ public class TestFragments {
    public void testFragmentsExist() {
       testFragmentExists("pwsc1_derefidx_vbuxx=vwsc2");
       testFragmentExists("pwsc1_derefidx_vbuyy=vwsc2");
+      testFragmentExists("pwsc1_derefidx_vbuxx=pwsc1_derefidx_vbuxx_minus_vbuc2");
+      testFragmentExists("pwsc1_derefidx_vbuyy=pwsc1_derefidx_vbuyy_minus_vbuc2");
    }
 
    /**