diff --git a/src/Ophis/Opcodes.py b/src/Ophis/Opcodes.py
index 6e01c0d..0b820c5 100644
--- a/src/Ophis/Opcodes.py
+++ b/src/Ophis/Opcodes.py
@@ -427,7 +427,7 @@ csg4502extensions = {
                              None, None, None, None, None, None, None, None, None, None, None, None, None],
                      'dec': [0x3A, None, None, 0xC6, 0xD6, None, 0xCE, 0xDE,
                              None, None, None, None, None, None, None, None, None, None, None, None, None],
-                     'dew': [None, None, None, None, None, None, 0xC3, None,
+                     'dew': [None, None, None, 0xC3, None, None, None, None,
                              None, None, None, None, None, None, None, None, None, None, None, None, None],
                      'dez': [0x3B, None, None, None, None, None, None, None,
                              None, None, None, None, None, None, None, None, None, None, None, None, None],
@@ -437,7 +437,7 @@ csg4502extensions = {
                              0x59, None, None, None, None, None, 0x41, 0x51, None, 0x52, None, None, None],
                      'inc': [0x1A, None, None, 0xE6, 0xF6, None, 0xEE, 0xFE,
                              None, None, None, None, None, None, None, None, None, None, None, None, None],
-                     'inw': [None, None, None, None, None, None, 0xE3, None,
+                     'inw': [None, None, None, 0xE3, None, None, None, None,
                              None, None, None, None, None, None, None, None, None, None, None, None, None],
                      'inz': [0x1B, None, None, None, None, None, None, None,
                              None, None, None, None, None, None, None, None, None, None, None, None, None],
diff --git a/tests/test4502.bin b/tests/test4502.bin
new file mode 100644
index 0000000..ad317e7
Binary files /dev/null and b/tests/test4502.bin differ
diff --git a/tests/test4502.oph b/tests/test4502.oph
index 780f83f..27f233c 100644
--- a/tests/test4502.oph
+++ b/tests/test4502.oph
@@ -82,7 +82,7 @@
 	LDY	$BCBC,X		;  BC: LDY - Absolute, X
 	BBS3	$BF, ^-$3E	;  BF: BBS3 - Zero Page, Relative
 	CPZ	#$C2 		;  C2: CPZ - Immediate
-	DEW	$C3C3		;  C3: DEW - Absolute
+	DEW	$C3		;  C3: DEW - Zero Page
 	SMB4	$C7		;  C7: SMB4 - Zero Page
 	ASW	$CBCB		;  CB: ASW - Absolute
 	BBS4	$CF, ^-$2E	;  CF: BBS4 - Zero Page, Relative
@@ -92,7 +92,7 @@
 	PHZ			;  DB: PHZ - Implied
 	BBS5	$DF, ^-$1E	;  DF: BBS5 - Zero Page, Relative
 	LDA 	($E2,SP),Y	;  E2: LDA - (Zero Page, SP), Y
-	INW	$E3E3		;  E3: INW - Absolute
+	INW	$E3		;  E3: INW - Zero Page
 	PHW	#$E4E4		;  E4: PHW - ImmediateLong
 	SMB6	$E7		;  E7: SMB6 - Zero Page
 	EOM			;  EA: EOM - Implied