diff --git a/gotools/ChangeLog b/gotools/ChangeLog
index 2d33c70dc30b2cde0e21de11289af2f60e8d5673..18cbf119933b146ea541003380f9408b76f31594 100644
--- a/gotools/ChangeLog
+++ b/gotools/ChangeLog
@@ -1,3 +1,9 @@
+2017-07-26  Ian Lance Taylor  <iant@golang.org>
+
+	PR go/81548
+	* Makefile.am (MOSTLYCLEANFILES): Add *.sent.
+	* Makefile.in: Rebuild.
+
 2017-07-15  Ian Lance Taylor  <iant@golang.org>
 
 	* Makefile.am (CHECK_ENV): Set GOROOT.
diff --git a/gotools/Makefile.am b/gotools/Makefile.am
index 68a7003f8f5c4d9bbe2314acbc0453d15ca7241a..b9dced4a5d761ac3e328cc915117a5308676ed0d 100644
--- a/gotools/Makefile.am
+++ b/gotools/Makefile.am
@@ -109,7 +109,7 @@ s-zdefaultcc: Makefile
 
 MOSTLYCLEANFILES = \
 	zdefaultcc.go s-zdefaultcc \
-	check-gccgo gotools.head *-testlog gotools.sum gotools.log
+	check-gccgo gotools.head *-testlog gotools.sum gotools.log *.sent
 
 mostlyclean-local:
 	rm -rf check-go-dir check-runtime-dir cgo-test-dir carchive-test-dir
diff --git a/gotools/Makefile.in b/gotools/Makefile.in
index e083bb473ada0c06cddec987107def44105140e1..9c0084e2e187ff73caa134c6d0301047cc90d066 100644
--- a/gotools/Makefile.in
+++ b/gotools/Makefile.in
@@ -316,7 +316,7 @@ GCC_INSTALL_NAME := $(shell echo gcc|sed '$(program_transform_name)')
 GXX_INSTALL_NAME := $(shell echo g++|sed '$(program_transform_name)')
 MOSTLYCLEANFILES = \
 	zdefaultcc.go s-zdefaultcc \
-	check-gccgo gotools.head *-testlog gotools.sum gotools.log
+	check-gccgo gotools.head *-testlog gotools.sum gotools.log *.sent
 
 
 # For a native build we build the programs using the newly built libgo