diff --git a/harbour/contrib/libct/posdiff.c b/harbour/contrib/libct/posdiff.c
index cbebda9e2a..df0b827498 100644
--- a/harbour/contrib/libct/posdiff.c
+++ b/harbour/contrib/libct/posdiff.c
@@ -212,7 +212,7 @@ HB_FUNC (POSEQUAL)
     size_t sStrLen2 = hb_parclen (2);
     char *pc1, *pc2;
 
-    size_t sIgnore, sCompare, sCompareCnt, sRet;
+    size_t sIgnore, sCompare, sCompareCnt, sRet = 0;
 
     if (ISNUM (4))
       sIgnore = hb_parnl (4);