diff --git a/src/mem/row.c b/src/mem/row.c
index f4caf7a24..ccd0325a4 100644
--- a/src/mem/row.c
+++ b/src/mem/row.c
@@ -214,7 +214,7 @@ row_reset(UNUSED(void *priv))
     uint32_t boundary;
     uint32_t shift;
 
-    for (uint8_t i = (rows_num - 1); i >= 0; i--)
+    for (int8_t i = (rows_num - 1); i >= 0; i--)
         row_disable(i);
 
     for (uint8_t i = 0; i < rows_num; i++) {