diff --git a/dev/hcstackcollapse.pl b/dev/hcstackcollapse.pl
index cc249d03..9e562824 100755
--- a/dev/hcstackcollapse.pl
+++ b/dev/hcstackcollapse.pl
@@ -1,6 +1,6 @@
 #!/usr/bin/perl -w
 #
-# hcstackcolllapse.pl	collapse hot/cold multiline stacks into single lines.
+# hcstackcollapse.pl	collapse hot/cold multiline stacks into single lines.
 #
 # EXPERIMENTAL: This is a work in progress, and may not work properly.
 #
diff --git a/stackcollapse-go.pl b/stackcollapse-go.pl
index 986b7d5f..3b2ce3c5 100755
--- a/stackcollapse-go.pl
+++ b/stackcollapse-go.pl
@@ -1,6 +1,6 @@
 #!/usr/bin/perl -w
 #
-# stackcolllapse-go.pl  collapse golang samples into single lines.
+# stackcollapse-go.pl  collapse golang samples into single lines.
 #
 # Parses golang smaples generated by "go tool pprof" and outputs stacks as
 # single lines, with methods separated by semicolons, and then a space and an
diff --git a/stackcollapse-jstack.pl b/stackcollapse-jstack.pl
index f4aa6a18..24541d09 100755
--- a/stackcollapse-jstack.pl
+++ b/stackcollapse-jstack.pl
@@ -1,6 +1,6 @@
 #!/usr/bin/perl -w
 #
-# stackcolllapse-jstack.pl	collapse jstack samples into single lines.
+# stackcollapse-jstack.pl	collapse jstack samples into single lines.
 #
 # Parses Java stacks generated by jstack(1) and outputs RUNNABLE stacks as
 # single lines, with methods separated by semicolons, and then a space and an
diff --git a/stackcollapse-ljp.awk b/stackcollapse-ljp.awk
index d1465ba0..59aaae3d 100755
--- a/stackcollapse-ljp.awk
+++ b/stackcollapse-ljp.awk
@@ -1,6 +1,6 @@
 #!/usr/bin/awk -f
 #
-# stackcolllapse-ljp.awk	collapse lightweight java profile reports
+# stackcollapse-ljp.awk	collapse lightweight java profile reports
 #				into single lines stacks.
 #
 # Parses a list of multiline stacks generated by:
diff --git a/stackcollapse-perf.pl b/stackcollapse-perf.pl
index e91f7deb..5cefa82a 100755
--- a/stackcollapse-perf.pl
+++ b/stackcollapse-perf.pl
@@ -1,6 +1,6 @@
 #!/usr/bin/perl -w
 #
-# stackcolllapse-perf.pl	collapse perf samples into single lines.
+# stackcollapse-perf.pl	collapse perf samples into single lines.
 #
 # Parses a list of multiline stacks generated by "perf script", and
 # outputs a semicolon separated stack followed by a space and a count.
diff --git a/stackcollapse-stap.pl b/stackcollapse-stap.pl
index b04aac47..bca40461 100755
--- a/stackcollapse-stap.pl
+++ b/stackcollapse-stap.pl
@@ -1,6 +1,6 @@
 #!/usr/bin/perl -w
 #
-# stackcolllapse-stap.pl	collapse multiline SystemTap stacks
+# stackcollapse-stap.pl	collapse multiline SystemTap stacks
 #				into single lines.
 #
 # Parses a multiline stack followed by a number on a separate line, and
diff --git a/stackcollapse.pl b/stackcollapse.pl
index 17144bb6..1e00c521 100755
--- a/stackcollapse.pl
+++ b/stackcollapse.pl
@@ -1,6 +1,6 @@
 #!/usr/bin/perl -w
 #
-# stackcolllapse.pl	collapse multiline stacks into single lines.
+# stackcollapse.pl	collapse multiline stacks into single lines.
 #
 # Parses a multiline stack followed by a number on a separate line, and
 # outputs a semicolon separated stack followed by a space and the number.