diff --git a/README.md b/README.md
index e102c00..7aedc02 100644
--- a/README.md
+++ b/README.md
@@ -76,7 +76,7 @@ CONFIGURATION EXPLANATION
 hh --show-configuration >> ~/.bashrc
 ```
 
-* bind `hh` to a BASH key e.g. to `Ctrl-R`:
+* bind `hh` to a BASH key e.g. to `Ctrl-r`:
 ```bash
 bind '"\C-r": "\C-ahh \C-j"'
 ```
@@ -84,6 +84,11 @@ or `Ctrl-F12`:
 ```bash
 bind '"\e[24;5~":"\C-ahh \C-j"'
 ```
+bind `hh` to `Ctrl-r` only if this is interactive shell:
+```bash
+if [[ $- =~ .*i.* ]]; then bind '"\C-r": "\C-a hh \C-j"'; fi
+```
+
 To determine the character sequence emitted by a pressed key in terminal, 
 type `Ctrl-v` and then press the key. Check your current bindings using:
 ```bash
@@ -94,15 +99,15 @@ bind -S
 ```bash
 export HH_CONFIG=hicolor
 ```
-Show normal history by default (instead of metrics-based view):
+show normal history by default (instead of metrics-based view):
 ```bash
 export HH_CONFIG=rawhistory
 ```
-Make search case sensitive (insensitive by default):
+make search case sensitive (insensitive by default):
 ```bash
 export HH_CONFIG=casesensitive
 ```
-More colors and case sensitive search:
+more colors and case sensitive search:
 ```bash
 export HH_CONFIG=hicolor,casesensitive
 ```
diff --git a/man/hh.1 b/man/hh.1
index c62b016..42e97be 100644
--- a/man/hh.1
+++ b/man/hh.1
@@ -83,7 +83,8 @@ export HISTCONTROL=ignorespace   # leading space hides commands from history
 export HISTFILESIZE=10000        # increase history file size (default is 500)
 export HISTSIZE=${HISTFILESIZE}  # increase history size (default is 500)
 export PROMPT_COMMAND="history \-a; history \-n; ${PROMPT_COMMAND}"
-bind '"\eC\-r": "\eC\-a hh \eC-j"'    # bind hh to Ctrl-r
+# if this is interactive shell, then bind hh to Ctrl-r
+if [[ $\- =~ .*i.* ]]; then bind '"\eC\-r": "\eC\-a hh \eC-j"'; fi
 .sp
 .fi
 The prompt command ensures synchronization of the history between BASH memory 
diff --git a/src/hstr.c b/src/hstr.c
index 51a8314..5a919b1 100644
--- a/src/hstr.c
+++ b/src/hstr.c
@@ -85,7 +85,8 @@ static const char *INSTALL_STRING=
 		"\nexport HISTFILESIZE=10000        # increase history file size (default is 500)"
 		"\nexport HISTSIZE=${HISTFILESIZE}  # increase history size (default is 500)"
 		"\nexport PROMPT_COMMAND=\"history -a; history -n; ${PROMPT_COMMAND}\"   # mem/file sync"
-		"\nbind '\"\\C-r\": \"\\C-a hh \\C-j\"'    # bind hh to Ctrl-r"
+		"\n# if this is interactive shell, then bind hh to Ctrl-r"
+		"\nif [[ $- =~ .*i.* ]]; then bind '\"\\C-r\": \"\\C-a hh \\C-j\"'; fi"
 		"\n\n";
 
 static const char *HELP_STRING=