diff --git a/aliases/functions b/aliases/functions
index 651fdd4..713626a 100644
--- a/aliases/functions
+++ b/aliases/functions
@@ -13,10 +13,14 @@ alias :q="exit"
 alias rget="rsync -rP --append-verify --inplace"
 alias 7zu="7z a -t7z -m0=lzma -mx=9 -mfb=64 -md=32m -ms=on"
 
-if command -v fd >/dev/null; then
-    alias f="fd"
-else
-    f() { noglob find . -iname "*${*}*" }
+if ! command -v fd >/dev/null; then
+    fd() {
+	if [[ "$1" =~ "-*" ]]; then
+	    echo "fd not installed. shell alias supports only basic operation"
+	    return 1
+	fi
+	noglob find . -iname "*${*}*"
+    }
 fi
 
 alias sudo="sudo "