diff --git a/filters.cpp b/filters.cpp
index a06360b..a60cc4e 100644
--- a/filters.cpp
+++ b/filters.cpp
@@ -136,9 +136,9 @@ bool StringFilter::_match_regex(const LogcatEntry& entry) const {
 
     matched = this->_regex->match(str ? str->data() : "", 1, pmatch, eflags);
     if (this->exact_match) {
-        matched = matched && pmatch[0].rm_so == 0 && str
+        matched = matched && pmatch[0].rm_so == 0 && (str
             ? static_cast<size_t>(pmatch[0].rm_eo) == str->size()
-            : pmatch[0].rm_so == 0;
+            : pmatch[0].rm_eo == 0);
     }
     return matched;
 }