diff --git a/share/adapters/oeis.sh b/share/adapters/oeis.sh
index 9273963..b823e4a 100755
--- a/share/adapters/oeis.sh
+++ b/share/adapters/oeis.sh
@@ -104,7 +104,7 @@ oeis() (
   # Search unknown sequence
   else
     # Build URL
-    URL+="/search?q=signed%3A$(echo $@ | tr -sc '[:digit:]' ',')"
+    URL+="/search?q=signed%3A$(echo $@ | tr -sc '[:digit:]-' ',')"
     curl $URL 2>/dev/null > $DOC
     # Sequence IDs
     grep -o '=id:.*&' $DOC \