diff --git a/extractor/text.go b/extractor/text.go
index 436bfa99..29638b12 100644
--- a/extractor/text.go
+++ b/extractor/text.go
@@ -26,7 +26,7 @@ const verbose = false
 
 // maxFormStack is the maximum form stack recursion depth. It has to be low enough to avoid a stack
 // overflow and high enough to accomodate customers' PDFs
-const maxFormStack 10
+const maxFormStack = 10
 
 // ExtractText processes and extracts all text data in content streams and returns as a string.
 // It takes into account character encodings in the PDF file, which are decoded by