diff --git a/src/open9x.cpp b/src/open9x.cpp
index bbf272541..0809d0968 100644
--- a/src/open9x.cpp
+++ b/src/open9x.cpp
@@ -2802,7 +2802,7 @@ ISR(TIMER0_COMP_vect, ISR_NOBLOCK) //10ms timer
     per10ms();
 
 #if defined(PCBV4) && defined(SDCARD)
-//    sdPoll10mS();
+    sdPoll10mS();
 #endif
 
 #if !defined(PCBV4)