diff --git a/CHANGES b/CHANGES
index f33f09aaa..01fc4dfb9 100644
--- a/CHANGES
+++ b/CHANGES
@@ -10,6 +10,7 @@ Bugfixes:
  - Util: Fix realloc semantics in utf16to8
  - PSP2: Fix GPU crash while exiting
  - PSP2: Fix VSync
+ - ARM7: Fix decoding of Thumb ADD (variants 5 and 6)
 Misc:
  - 3DS: Use blip_add_delta_fast for a small speed improvement
  - OpenGL: Log shader compilation failure
diff --git a/src/arm/decoder-thumb.c b/src/arm/decoder-thumb.c
index 538773ec7..707324023 100644
--- a/src/arm/decoder-thumb.c
+++ b/src/arm/decoder-thumb.c
@@ -143,7 +143,7 @@ DEFINE_DECODER_WITH_HIGH_THUMB(MOV3, MOV, ARM_OPERAND_AFFECTED_1, 0)
 
 #define DEFINE_IMMEDIATE_WITH_REGISTER_DATA_THUMB(NAME, MNEMONIC, REG) \
 	DEFINE_THUMB_DECODER(NAME, MNEMONIC, \
-		info->op1.reg = (opcode >> 6) & 0x0007; \
+		info->op1.reg = (opcode >> 8) & 0x0007; \
 		info->op2.reg = REG; \
 		info->op3.immediate = (opcode & 0x00FF) << 2; \
 		info->operandFormat = ARM_OPERAND_REGISTER_1 | \