diff --git a/src/cmd/go/alldocs.go b/src/cmd/go/alldocs.go
index 33f6126ada..6e8d60f4cd 100644
--- a/src/cmd/go/alldocs.go
+++ b/src/cmd/go/alldocs.go
@@ -1554,6 +1554,8 @@
 //
 // 	GOEXE
 // 		The executable file name suffix (".exe" on Windows, "" on other systems).
+// 	GOGCCFLAGS
+// 		A space-separated list of arguments supplied to the CC command.
 // 	GOHOSTARCH
 // 		The architecture (GOARCH) of the Go toolchain binaries.
 // 	GOHOSTOS
diff --git a/src/cmd/go/internal/help/helpdoc.go b/src/cmd/go/internal/help/helpdoc.go
index 916b91efa7..a989483e60 100644
--- a/src/cmd/go/internal/help/helpdoc.go
+++ b/src/cmd/go/internal/help/helpdoc.go
@@ -587,6 +587,8 @@ Additional information available from 'go env' but not read from the environment
 
 	GOEXE
 		The executable file name suffix (".exe" on Windows, "" on other systems).
+	GOGCCFLAGS
+		A space-separated list of arguments supplied to the CC command.
 	GOHOSTARCH
 		The architecture (GOARCH) of the Go toolchain binaries.
 	GOHOSTOS