diff --git a/src/check.h.in b/src/check.h.in
index d5467279..3f41f843 100644
--- a/src/check.h.in
+++ b/src/check.h.in
@@ -1439,7 +1439,7 @@ do { \
 /**
  * Check two strings to determine if 0==strcmp(X,Y)
  *
- * If X or Y is NULL the test failes.
+ * If X or Y is NULL the test fails.
  * If not 0==strcmp(X,Y), the test fails.
  *
  * @param X string