diff --git a/Jamfile b/Jamfile
index 78508ee781..a39fd462bb 100644
--- a/Jamfile
+++ b/Jamfile
@@ -151,7 +151,7 @@ Depends LocaleKit :
 	LocaleKitTests
 ;
 
-# Pepare the optional build features before parsing the Jamfile tree.
+# Prepare the optional build features before parsing the Jamfile tree.
 include [ FDirName $(HAIKU_BUILD_RULES_DIR) OptionalBuildFeatures ] ;
 
 # Add optional packages given via HAIKU_ADD_OPTIONAL_PACKAGES.
diff --git a/build/jam/OptionalPackages b/build/jam/OptionalPackages
index 2dafc42a26..47b277066f 100644
--- a/build/jam/OptionalPackages
+++ b/build/jam/OptionalPackages
@@ -673,7 +673,7 @@ if [ IsOptionalHaikuImagePackageAdded Links ] {
 
 # MandatoryPackages
 if [ IsOptionalHaikuImagePackageAdded MandatoryPackages ] { 
-	# Psuedo package for grouping packages, which are added to all images.
+	# Pseudo package for grouping packages, which are added to all images.
 }