diff --git a/matching.go b/matching.go
index 94a6ea0..11ddaf3 100644
--- a/matching.go
+++ b/matching.go
@@ -150,7 +150,7 @@ func findAllMatchesHelper(start *State, str string, indices []matchIndex, offset
 				tempIndices, _ = unique_append(tempIndices, matchIndex{startIdx, endIdx})
 			}
 		}
-		if assertionFailed && numStatesMatched == 0 { // Nothing has matched and an assertion has failed - bort
+		if assertionFailed && numStatesMatched == 0 { // Nothing has matched and an assertion has failed - abort
 			if i == startingFrom {
 				i++
 			}
@@ -208,10 +208,13 @@ func findAllMatchesHelper(start *State, str string, indices []matchIndex, offset
 	tempStates = nil
 
 	for _, state := range currentStates {
-		// Only add the match if the start index is in bounds
+		// Only add the match if the start index is in bounds. If the state has an assertion,
+		// make sure the assertion checks out.
 		if state.isLast && startIdx < len(str) {
-			endIdx = i
-			tempIndices, _ = unique_append(tempIndices, matchIndex{startIdx, endIdx})
+			if state.assert == NONE || state.checkAssertion([]rune(str), len(str)) {
+				endIdx = i
+				tempIndices, _ = unique_append(tempIndices, matchIndex{startIdx, endIdx})
+			}
 		}
 	}
 	// Get the maximum index-range from the list