diff --git a/src/emu/cpu/arm/armdasm.c b/src/emu/cpu/arm/armdasm.c
index fedb5cdc24e..8771c0ba74d 100644
--- a/src/emu/cpu/arm/armdasm.c
+++ b/src/emu/cpu/arm/armdasm.c
@@ -15,7 +15,7 @@ static char *WriteImmediateOperand( char *pBuf, UINT32 opcode )
 
 	imm = opcode&0xff;
 	r = ((opcode>>8)&0xf)*2;
-	imm = (imm>>r)|(imm<<(32-r));
+	imm = (imm>>r)|(r?(imm<<(32-r)):0);
 	pBuf += sprintf( pBuf, ", #$%x", imm );
 	return pBuf;
 }