diff --git a/themes/powerline-plain/powerline-plain.theme.bash b/themes/powerline-plain/powerline-plain.theme.bash
index 709fe341..6ae81a56 100644
--- a/themes/powerline-plain/powerline-plain.theme.bash
+++ b/themes/powerline-plain/powerline-plain.theme.bash
@@ -12,7 +12,7 @@ POWERLINE_COMPACT_AFTER_SEPARATOR=${POWERLINE_COMPACT_AFTER_SEPARATOR:=${POWERLI
 POWERLINE_COMPACT_BEFOR_FIRST_SEGMENT=${POWERLINE_COMPACT_BEFORE_FIRST_SEGMENT:=${POWERLINE_COMPACT}}
 POWERLINE_COMPACT_AFTER_LAST_SEGMENT=${POWERLINE_COMPACT_AFTER_LAST_SEGMENT:=${POWERLINE_COMPACT}}
 POWERLINE_COMPACT_PROMPT=${POWERLINE_COMPACT_PROMPT:=${POWERLINE_COMPACT}}
-POWERLINE_PROMPT_AFTER="${POWERLINE_PROMPT_AFTER:-''}"
+POWERLINE_PROMPT_AFTER=${POWERLINE_PROMPT_AFTER:-""}
 
 PYTHON_VENV_CHAR=${POWERLINE_PYTHON_VENV_CHAR:="ⓔ "}
 CONDA_PYTHON_VENV_CHAR=${POWERLINE_CONDA_PYTHON_VENV_CHAR:="ⓔ "}