diff --git a/src/main/java/pt/ptcris/utils/ORCIDFundingHelper.java b/src/main/java/pt/ptcris/utils/ORCIDFundingHelper.java
index e10e147..a1290c9 100644
--- a/src/main/java/pt/ptcris/utils/ORCIDFundingHelper.java
+++ b/src/main/java/pt/ptcris/utils/ORCIDFundingHelper.java
@@ -296,7 +296,7 @@ else if (funding.getTitle().getTitle() == null)
 				res.add(INVALID_YEAR);
 		}		
 		
-		if (funding.getEndDate() != null && !!testQualityFuzzyDate(funding.getEndDate()))
+		if (funding.getEndDate() != null && !testQualityFuzzyDate(funding.getEndDate()))
 			res.add(INVALID_PUBLICATIONDATE);
 			
 		Map<Funding, ExternalIdsDiff> fundingsDiffs = getSelfExternalIdsDiffS(funding, others);