diff --git a/1990/baruch/Makefile b/1990/baruch/Makefile
index 7002cc38e..82a952172 100644
--- a/1990/baruch/Makefile
+++ b/1990/baruch/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/1990/cmills/Makefile b/1990/cmills/Makefile
index c5a9dfbde..526b3832d 100644
--- a/1990/cmills/Makefile
+++ b/1990/cmills/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/1990/dds/Makefile b/1990/dds/Makefile
index bd065d178..f1d94f4b3 100644
--- a/1990/dds/Makefile
+++ b/1990/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/1990/dg/Makefile b/1990/dg/Makefile
index f23a1d889..7417cb9fb 100644
--- a/1990/dg/Makefile
+++ b/1990/dg/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/1990/jaw/Makefile b/1990/jaw/Makefile
index 1e0cb51bc..b1ffa0eb5 100644
--- a/1990/jaw/Makefile
+++ b/1990/jaw/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/1990/pjr/Makefile b/1990/pjr/Makefile
index 737cea687..a00549677 100644
--- a/1990/pjr/Makefile
+++ b/1990/pjr/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/1990/scjones/Makefile b/1990/scjones/Makefile
index 6f7e1dc45..6ce37c4db 100644
--- a/1990/scjones/Makefile
+++ b/1990/scjones/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/1990/stig/Makefile b/1990/stig/Makefile
index 55e1c7821..ef2e12a0e 100644
--- a/1990/stig/Makefile
+++ b/1990/stig/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/1990/tbr/Makefile b/1990/tbr/Makefile
index 321421cb6..8541dfa9d 100644
--- a/1990/tbr/Makefile
+++ b/1990/tbr/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/1990/theorem/Makefile b/1990/theorem/Makefile
index 0c817ff18..5dcd5a5b7 100644
--- a/1990/theorem/Makefile
+++ b/1990/theorem/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/1990/westley/Makefile b/1990/westley/Makefile
index 27c352e2d..d8fbeed71 100644
--- a/1990/westley/Makefile
+++ b/1990/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