diff --git a/common/boot_control_stub.h b/common/boot_control_stub.h
index 7832adc..9e3b05c 100644
--- a/common/boot_control_stub.h
+++ b/common/boot_control_stub.h
@@ -27,7 +27,7 @@
 // typically used when e.g. an underlying HAL implementation cannot be
 // loaded or doesn't exist.
 //
-// You are gauranteed that the implementation of GetNumSlots() method
+// You are guaranteed that the implementation of GetNumSlots() method
 // always returns 0. This can be used to identify that this
 // implementation is in use.
 class BootControlStub : public BootControlInterface {
diff --git a/common/error_code.h b/common/error_code.h
index ce41d19..c7e4967 100644
--- a/common/error_code.h
+++ b/common/error_code.h
@@ -116,7 +116,7 @@
   // modify the implementation of ErrorCode into a properly encapsulated class.
   kDevModeFlag = 1 << 31,
 
-  // Set if resuming an interruped update.
+  // Set if resuming an interrupted update.
   kResumedFlag = 1 << 30,
 
   // Set if using a dev/test image as opposed to an MP-signed image.
diff --git a/common/utils.cc b/common/utils.cc
index f651823..d935535 100644
--- a/common/utils.cc
+++ b/common/utils.cc
@@ -291,7 +291,10 @@
   return true;
 }
 
-bool PReadAll(const FileDescriptorPtr& fd, void* buf, size_t count, off_t offset,
+bool PReadAll(const FileDescriptorPtr& fd,
+              void* buf,
+              size_t count,
+              off_t offset,
               ssize_t* out_bytes_read) {
   TEST_AND_RETURN_FALSE_ERRNO(fd->Seek(offset, SEEK_SET) !=
                               static_cast<off_t>(-1));
@@ -774,7 +777,7 @@
   if (size < offsetof(Elf32_Ehdr, e_machine) + sizeof(hdr->e_machine))
     return true;
   uint16_t e_machine;
-  // Fix endianess regardless of the host endianess.
+  // Fix endianness regardless of the host endianness.
   if (ei_data == ELFDATA2LSB)
     e_machine = le16toh(hdr->e_machine);
   else
diff --git a/common/utils.h b/common/utils.h
index c102a16..5c44083 100644
--- a/common/utils.h
+++ b/common/utils.h
@@ -110,7 +110,7 @@
 // occurs, -1 is returned.
 off_t BlockDevSize(int fd);
 
-// Returns the size of the file at path, or the file desciptor fd. If the file
+// Returns the size of the file at path, or the file descriptor fd. If the file
 // is actually a block device, this function will automatically call
 // BlockDevSize. If the file doesn't exist or some error occurrs, -1 is
 // returned.