Merge "Fix a trivial comment typo."
diff --git a/core/main.mk b/core/main.mk
index 13465e3..41e2801 100644
--- a/core/main.mk
+++ b/core/main.mk
@@ -29,7 +29,7 @@
# TOPDIR is the normal variable you should use, because
# if we are executing relative to the current directory
# it can be "", whereas TOP must be "." which causes
-# pattern matching probles when make strips off the
+# pattern matching problems when make strips off the
# trailing "./" from paths in various places.
#ifeq ($(TOP),.)
#TOPDIR :=