diff --git a/src/emu/cpu/arm7/arm7dasm.c b/src/emu/cpu/arm7/arm7dasm.c
index 5f42f2f0507..c7cfa2af33e 100644
--- a/src/emu/cpu/arm7/arm7dasm.c
+++ b/src/emu/cpu/arm7/arm7dasm.c
@@ -112,7 +112,7 @@ 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;
 }