diff --git a/1987/biggar/Makefile b/1987/biggar/Makefile
index 9b057eda9..aa8772879 100644
--- a/1987/biggar/Makefile
+++ b/1987/biggar/Makefile
@@ -143,6 +143,7 @@ GENCAT= gencat
 GENSTRINGS= genstrings
 GETOPT= getopt
 GETOPTS= getopts
+GINDENT= gindent
 GNUMAKE= gnumake
 GREP= grep
 GROFF= groff
diff --git a/1987/heckbert/Makefile b/1987/heckbert/Makefile
index 880ce5d91..1aaf8db8b 100644
--- a/1987/heckbert/Makefile
+++ b/1987/heckbert/Makefile
@@ -143,6 +143,7 @@ GENCAT= gencat
 GENSTRINGS= genstrings
 GETOPT= getopt
 GETOPTS= getopts
+GINDENT= gindent
 GNUMAKE= gnumake
 GREP= grep
 GROFF= groff
diff --git a/1987/hines/Makefile b/1987/hines/Makefile
index 8f51cacdb..27750a393 100644
--- a/1987/hines/Makefile
+++ b/1987/hines/Makefile
@@ -143,6 +143,7 @@ GENCAT= gencat
 GENSTRINGS= genstrings
 GETOPT= getopt
 GETOPTS= getopts
+GINDENT= gindent
 GNUMAKE= gnumake
 GREP= grep
 GROFF= groff
diff --git a/1987/korn/Makefile b/1987/korn/Makefile
index 12a86f9d2..521f19afc 100644
--- a/1987/korn/Makefile
+++ b/1987/korn/Makefile
@@ -143,6 +143,7 @@ GENCAT= gencat
 GENSTRINGS= genstrings
 GETOPT= getopt
 GETOPTS= getopts
+GINDENT= gindent
 GNUMAKE= gnumake
 GREP= grep
 GROFF= groff
diff --git a/1987/lievaart/Makefile b/1987/lievaart/Makefile
index c4a938e03..86a37e69a 100644
--- a/1987/lievaart/Makefile
+++ b/1987/lievaart/Makefile
@@ -143,6 +143,7 @@ GENCAT= gencat
 GENSTRINGS= genstrings
 GETOPT= getopt
 GETOPTS= getopts
+GINDENT= gindent
 GNUMAKE= gnumake
 GREP= grep
 GROFF= groff
diff --git a/1987/wall/Makefile b/1987/wall/Makefile
index 4e4d79b49..d08a7783c 100644
--- a/1987/wall/Makefile
+++ b/1987/wall/Makefile
@@ -143,6 +143,7 @@ GENCAT= gencat
 GENSTRINGS= genstrings
 GETOPT= getopt
 GETOPTS= getopts
+GINDENT= gindent
 GNUMAKE= gnumake
 GREP= grep
 GROFF= groff
diff --git a/1987/westley/Makefile b/1987/westley/Makefile
index 6490e1c9f..95e0e8f92 100644
--- a/1987/westley/Makefile
+++ b/1987/westley/Makefile
@@ -143,6 +143,7 @@ GENCAT= gencat
 GENSTRINGS= genstrings
 GETOPT= getopt
 GETOPTS= getopts
+GINDENT= gindent
 GNUMAKE= gnumake
 GREP= grep
 GROFF= groff