diff --git a/boards/ikea-tradfri/Makefile.features b/boards/ikea-tradfri/Makefile.features
index a869a893f9603..d03b3183b67f0 100644
--- a/boards/ikea-tradfri/Makefile.features
+++ b/boards/ikea-tradfri/Makefile.features
@@ -7,4 +7,4 @@ FEATURES_PROVIDED += periph_rtc
 FEATURES_PROVIDED += periph_rtt
 FEATURES_PROVIDED += periph_spi
 FEATURES_PROVIDED += periph_timer
-FEATURES_PROVIDED += periph_uart
+FEATURES_PROVIDED += periph_uart periph_uart_modecfg
diff --git a/boards/slstk3401a/Makefile.features b/boards/slstk3401a/Makefile.features
index c062c756c9418..5f4f50a88afac 100644
--- a/boards/slstk3401a/Makefile.features
+++ b/boards/slstk3401a/Makefile.features
@@ -9,6 +9,6 @@ FEATURES_PROVIDED += periph_rtc
 FEATURES_PROVIDED += periph_rtt
 FEATURES_PROVIDED += periph_spi
 FEATURES_PROVIDED += periph_timer
-FEATURES_PROVIDED += periph_uart
+FEATURES_PROVIDED += periph_uart periph_uart_modecfg
 
 include $(RIOTBOARD)/common/silabs/Makefile.features
diff --git a/boards/slstk3402a/Makefile.features b/boards/slstk3402a/Makefile.features
index 39f5c017bc799..64146736b0d75 100644
--- a/boards/slstk3402a/Makefile.features
+++ b/boards/slstk3402a/Makefile.features
@@ -9,6 +9,6 @@ FEATURES_PROVIDED += periph_rtc
 FEATURES_PROVIDED += periph_rtt
 FEATURES_PROVIDED += periph_spi
 FEATURES_PROVIDED += periph_timer
-FEATURES_PROVIDED += periph_uart
+FEATURES_PROVIDED += periph_uart periph_uart_modecfg
 
 include $(RIOTBOARD)/common/silabs/Makefile.features
diff --git a/boards/sltb001a/Makefile.features b/boards/sltb001a/Makefile.features
index 63a8013ec990d..94136df1345d6 100644
--- a/boards/sltb001a/Makefile.features
+++ b/boards/sltb001a/Makefile.features
@@ -9,6 +9,6 @@ FEATURES_PROVIDED += periph_rtc
 FEATURES_PROVIDED += periph_rtt
 FEATURES_PROVIDED += periph_spi
 FEATURES_PROVIDED += periph_timer
-FEATURES_PROVIDED += periph_uart
+FEATURES_PROVIDED += periph_uart periph_uart_modecfg
 
 include $(RIOTBOARD)/common/silabs/Makefile.features
diff --git a/boards/slwstk6000b/Makefile.features b/boards/slwstk6000b/Makefile.features
index 9266cb0b43035..aa52fa205f5ea 100644
--- a/boards/slwstk6000b/Makefile.features
+++ b/boards/slwstk6000b/Makefile.features
@@ -6,7 +6,7 @@ FEATURES_PROVIDED += periph_rtc
 FEATURES_PROVIDED += periph_rtt
 FEATURES_PROVIDED += periph_spi
 FEATURES_PROVIDED += periph_timer
-FEATURES_PROVIDED += periph_uart
+FEATURES_PROVIDED += periph_uart periph_uart_modecfg
 
 include $(RIOTBOARD)/common/silabs/Makefile.features
 
diff --git a/boards/stk3600/Makefile.features b/boards/stk3600/Makefile.features
index 02dd454c32814..1f8d45238bd94 100644
--- a/boards/stk3600/Makefile.features
+++ b/boards/stk3600/Makefile.features
@@ -11,6 +11,6 @@ FEATURES_PROVIDED += periph_rtc
 FEATURES_PROVIDED += periph_rtt
 FEATURES_PROVIDED += periph_spi
 FEATURES_PROVIDED += periph_timer
-FEATURES_PROVIDED += periph_uart
+FEATURES_PROVIDED += periph_uart periph_uart_modecfg
 
 include $(RIOTBOARD)/common/silabs/Makefile.features
diff --git a/boards/stk3700/Makefile.features b/boards/stk3700/Makefile.features
index d6453d65eec33..38405db994272 100644
--- a/boards/stk3700/Makefile.features
+++ b/boards/stk3700/Makefile.features
@@ -11,6 +11,6 @@ FEATURES_PROVIDED += periph_rtc
 FEATURES_PROVIDED += periph_rtt
 FEATURES_PROVIDED += periph_spi
 FEATURES_PROVIDED += periph_timer
-FEATURES_PROVIDED += periph_uart
+FEATURES_PROVIDED += periph_uart periph_uart_modecfg
 
 include $(RIOTBOARD)/common/silabs/Makefile.features