diff --git a/src/hw/sdcard.c b/src/hw/sdcard.c
index 6410340..910bc58 100644
--- a/src/hw/sdcard.c
+++ b/src/hw/sdcard.c
@@ -501,6 +501,9 @@ sdcard_controller_setup(struct sdhci_s *regs, int prio)
     if (volt < 0)
         return;
 
+    // Let card/controller stabilize
+    msleep(5);
+
     // Initialize card
     struct sddrive_s *drive = malloc_fseg(sizeof(*drive));
     if (!drive) {