diff --git a/.prompt b/.prompt
index 055899e..f929c92 100644
--- a/.prompt
+++ b/.prompt
@@ -132,9 +132,9 @@ __prompt() {
 
 	# Remove decimal point, simulating multiplying by 1 million
 	PROMPT_RT1M="${PROMPT_RT/.}"
-	PROMPT_RT1M="${PROMPT_RT/,}"
+	PROMPT_RT1M="${PROMPT_RT1M/,}"
 	LAST_RT1M="${LAST_RT/.}"
-	LAST_RT1M="${LAST_RT/,}"
+	LAST_RT1M="${LAST_RT1M/,}"
 
 	((CMD_US=PROMPT_RT1M-LAST_RT1M))