diff --git a/1991/ant/Makefile b/1991/ant/Makefile
index cec6237fe..d4d5232ff 100644
--- a/1991/ant/Makefile
+++ b/1991/ant/Makefile
@@ -306,8 +306,8 @@ ZFORCE= zforce
 ZGREP= zgrep
 ZIP= zip
 ZIPCLOAK= zipcloak
-ZIPGREp= zipgrep
-ZIPINFo= zipinfo
+ZIPGREP= zipgrep
+ZIPINFO= zipinfo
 ZIPNOTE= zipnote
 ZIPSPLIT= zipsplit
 ZLESS= zless
diff --git a/1991/brnstnd/Makefile b/1991/brnstnd/Makefile
index 7ccc552d7..7a6a8b111 100644
--- a/1991/brnstnd/Makefile
+++ b/1991/brnstnd/Makefile
@@ -306,8 +306,8 @@ ZFORCE= zforce
 ZGREP= zgrep
 ZIP= zip
 ZIPCLOAK= zipcloak
-ZIPGREp= zipgrep
-ZIPINFo= zipinfo
+ZIPGREP= zipgrep
+ZIPINFO= zipinfo
 ZIPNOTE= zipnote
 ZIPSPLIT= zipsplit
 ZLESS= zless
diff --git a/1991/buzzard/Makefile b/1991/buzzard/Makefile
index f4b249389..7ad2a9424 100644
--- a/1991/buzzard/Makefile
+++ b/1991/buzzard/Makefile
@@ -306,8 +306,8 @@ ZFORCE= zforce
 ZGREP= zgrep
 ZIP= zip
 ZIPCLOAK= zipcloak
-ZIPGREp= zipgrep
-ZIPINFo= zipinfo
+ZIPGREP= zipgrep
+ZIPINFO= zipinfo
 ZIPNOTE= zipnote
 ZIPSPLIT= zipsplit
 ZLESS= zless
diff --git a/1991/cdupont/Makefile b/1991/cdupont/Makefile
index 4d92bf6d2..f86395c62 100644
--- a/1991/cdupont/Makefile
+++ b/1991/cdupont/Makefile
@@ -306,8 +306,8 @@ ZFORCE= zforce
 ZGREP= zgrep
 ZIP= zip
 ZIPCLOAK= zipcloak
-ZIPGREp= zipgrep
-ZIPINFo= zipinfo
+ZIPGREP= zipgrep
+ZIPINFO= zipinfo
 ZIPNOTE= zipnote
 ZIPSPLIT= zipsplit
 ZLESS= zless
diff --git a/1991/davidguy/Makefile b/1991/davidguy/Makefile
index 1de80b14f..458e94c72 100644
--- a/1991/davidguy/Makefile
+++ b/1991/davidguy/Makefile
@@ -306,8 +306,8 @@ ZFORCE= zforce
 ZGREP= zgrep
 ZIP= zip
 ZIPCLOAK= zipcloak
-ZIPGREp= zipgrep
-ZIPINFo= zipinfo
+ZIPGREP= zipgrep
+ZIPINFO= zipinfo
 ZIPNOTE= zipnote
 ZIPSPLIT= zipsplit
 ZLESS= zless
diff --git a/1991/dds/Makefile b/1991/dds/Makefile
index 06dae359f..bf682fa88 100644
--- a/1991/dds/Makefile
+++ b/1991/dds/Makefile
@@ -306,8 +306,8 @@ ZFORCE= zforce
 ZGREP= zgrep
 ZIP= zip
 ZIPCLOAK= zipcloak
-ZIPGREp= zipgrep
-ZIPINFo= zipinfo
+ZIPGREP= zipgrep
+ZIPINFO= zipinfo
 ZIPNOTE= zipnote
 ZIPSPLIT= zipsplit
 ZLESS= zless
diff --git a/1991/fine/Makefile b/1991/fine/Makefile
index a0e787eff..552fe5899 100644
--- a/1991/fine/Makefile
+++ b/1991/fine/Makefile
@@ -306,8 +306,8 @@ ZFORCE= zforce
 ZGREP= zgrep
 ZIP= zip
 ZIPCLOAK= zipcloak
-ZIPGREp= zipgrep
-ZIPINFo= zipinfo
+ZIPGREP= zipgrep
+ZIPINFO= zipinfo
 ZIPNOTE= zipnote
 ZIPSPLIT= zipsplit
 ZLESS= zless
diff --git a/1991/rince/Makefile b/1991/rince/Makefile
index 9ca33e43d..258527f9a 100644
--- a/1991/rince/Makefile
+++ b/1991/rince/Makefile
@@ -306,8 +306,8 @@ ZFORCE= zforce
 ZGREP= zgrep
 ZIP= zip
 ZIPCLOAK= zipcloak
-ZIPGREp= zipgrep
-ZIPINFo= zipinfo
+ZIPGREP= zipgrep
+ZIPINFO= zipinfo
 ZIPNOTE= zipnote
 ZIPSPLIT= zipsplit
 ZLESS= zless
diff --git a/1991/westley/Makefile b/1991/westley/Makefile
index d16183877..c81118518 100644
--- a/1991/westley/Makefile
+++ b/1991/westley/Makefile
@@ -306,8 +306,8 @@ ZFORCE= zforce
 ZGREP= zgrep
 ZIP= zip
 ZIPCLOAK= zipcloak
-ZIPGREp= zipgrep
-ZIPINFo= zipinfo
+ZIPGREP= zipgrep
+ZIPINFO= zipinfo
 ZIPNOTE= zipnote
 ZIPSPLIT= zipsplit
 ZLESS= zless