diff --git a/arm/armasm/plan9x.go b/arm/armasm/plan9x.go
index fae0ca6..d43cc96 100644
--- a/arm/armasm/plan9x.go
+++ b/arm/armasm/plan9x.go
@@ -185,6 +185,8 @@
 				} else {
 					fmt.Fprintf(&buf, "R%d-R%d", start, end)
 				}
+				start = -2
+				end = -2
 			}
 		}
 		for i := 0; i < 16; i++ {
@@ -195,6 +197,8 @@
 				}
 				start = i
 				end = i
+			} else {
+				flush()
 			}
 		}
 		flush()
diff --git a/arm/armasm/testdata/decode.txt b/arm/armasm/testdata/decode.txt
index cc1ea0a..2048e50 100644
--- a/arm/armasm/testdata/decode.txt
+++ b/arm/armasm/testdata/decode.txt
@@ -304,3 +304,4 @@
 |6b5721d3	1	gnu	error: unknown instruction
 |76452001	1	gnu	error: unknown instruction
 |97acd647	1	gnu	error: unknown instruction
+ed003be9|	1	plan9	LDMDB [R0,R2-R3,R5-R7], R11!