Baby Jonas Gutierrez was forced to wear a helmet when doctors diagnosed him with brachycephaly, or flat head syndrome.

In order to correct his condition, doctors told his parents that their 4-month-old would have to wear a helmet for 3 to 6 months. The little boy was born with a head in the 99th percentile for size.

While most babies are born with loose skull plates, they usually fuse correctly within a few weeks after birth. Baby Jonas' head, on the other hand, had developed a flat spot. To make it worse, the little guy insisted on sleeping on it.

"His head grew so rapidly that it had started actually pushing his head out to the sides," his mom, Shayna Gutierrez, told TODAY. "It is even affecting his face shape and could distort his features if left untreated."

Thankfully, it only takes an adorable little helmet to fix Jonas' condition.

When their parents explained to Jonas' big sister that her little brother would be wearing a helmet for a while, she knew exactly what to do.

Read about her adorable idea on the next page!

When Shayna Gutierrez shared photos on Facebook of her family wearing helmets in solidarity with baby Jonas, they instantly went viral.

All the credit goes to 3-year-old Camila, who came up with the idea.

"She immediately wanted her helmet and all of our bike helmets," said Shayna. "Now she just regularly asks us to wear ours too."

Camila truly is a wonderful big sister! In the adorable way only a 3-year-old could pull-off, she excitedly asked her parents if they would wear helmets too.

Who could say no to such an innocent request? Although she's happy that Camila instinctively understands the values of inclusion, Shayna says that the photos were just examples of their daily family life.

"...the truth is we were just being our normal selves on a normal Saturday morning at home and just giving in to the requests of our 3-year-old who asked us to wear helmets," she said.

Good job mama, these sweet siblings are the perfect pair!

[h/t ABC / TODAY/ CBS / Bored Panda]