Walcott has three goals in his last four games, including the Gunners first equaliser in the 2-2 draw with Manchester City on Sunday.
That strike took him to 18 goals for the season in just 31 appearances.
The 28-year-old now needs just four goals to make it his most successful goalscoring season in an Arsenal shirt.
Arsene Wenger claims Theo Walcott's goalscoring form is down to his new-found aggressive attitude
And Wenger believes the forward’s form in front of goal is all down to his new-found aggressive attitude.
“I was pleased to see Theo Walcott score again on Sunday,” Wenger wrote in his programme notes.
“He now has three goals in his last four games and I think this season he has found more determination, a more aggressive attitude.
Arsenal receive injury boost as Gunners train ahead of West Ham clash
Tue, April 4, 2017
Aaron Ramsey and Alex Oxlade-Chamberlain take part in training ahead of Arsenal's clash with West Ham United at the Emirates on Wednesday (7.45pm)
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Aaron Ramsey and Alex Oxlade-Chamberlain were in Arsenal training on Tuesday
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“He always had great quality in his runs, the quality of his receptions have always been very strong.
“I would say for many years he had not always an adjusted finishing quality.
“But he’s improved a lot on his finishing and that’s why he scores more goals.”