diff --git a/bash-color-prompt.sh b/bash-color-prompt.sh
index 195df2d..dc438d1 100644
--- a/bash-color-prompt.sh
+++ b/bash-color-prompt.sh
@@ -34,7 +34,7 @@ if [ -n "${BASH_VERSION}" -a '(' "$PS1" = "[\u@\h \W]\\$ " -o "$PS1" = "\\s-\\v\
     }
 
     prompt_default_os() {
-        eval $(grep ANSI_COLOR /etc/os-release)
+        eval "$(grep ANSI_COLOR /etc/os-release)"
         PROMPT_COLOR="$ANSI_COLOR"
         PROMPT_DIR_COLOR="$1"
         PROMPT_SEPARATOR=':'