diff --git a/scripts/variables.sh b/scripts/variables.sh
index a0c1858..7c4c3e2 100644
--- a/scripts/variables.sh
+++ b/scripts/variables.sh
@@ -6,3 +6,5 @@ default_update_key="U"
 
 clean_key_option="@tpm-clean"
 default_clean_key="M-u"
+
+SUPPORTED_TMUX_VERSION="1.9"
diff --git a/tpm b/tpm
index 679f001..287f9bb 100755
--- a/tpm
+++ b/tpm
@@ -4,8 +4,6 @@ CURRENT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
 BINDINGS_DIR="$CURRENT_DIR/bindings"
 SCRIPTS_DIR="$CURRENT_DIR/scripts"
 
-SUPPORTED_TMUX_VERSION="1.9"
-
 source "$SCRIPTS_DIR/variables.sh"
 source "$SCRIPTS_DIR/helpers.sh"