diff --git a/common.mk b/common.mk
index 4c5c17ed2c1f9822873c500b81236ea28bb21e2d..c5f5c544a7f931ff414a77742f99e8bd8a713ad4 100644
--- a/common.mk
+++ b/common.mk
@@ -17,6 +17,7 @@ OPTEE_TEST_PATH			?= $(ROOT)/optee_test
 OPTEE_TEST_OUT_PATH 		?= $(ROOT)/optee_test/out
 HELLOWORLD_PATH			?= $(ROOT)/hello_world
 
+# default high verbosity. slow uarts shall specify lower if prefered
 CFG_TEE_CORE_LOG_LEVEL		?= 3
 
 CCACHE ?= $(shell which ccache) # Don't remove this comment (space is needed)
diff --git a/hikey.mk b/hikey.mk
index c3f198e09fe5de6af0778d8ca9f8699982a59023..04c8838cdee54c015085053613d96f12c858000e 100644
--- a/hikey.mk
+++ b/hikey.mk
@@ -186,7 +186,7 @@ linux-cleaner: linux-cleaner-common
 ################################################################################
 # OP-TEE
 ################################################################################
-OPTEE_OS_COMMON_FLAGS += PLATFORM=hikey CFG_TEE_TA_LOG_LEVEL=3 CFG_CONSOLE_UART=$(CFG_SW_CONSOLE_UART)
+OPTEE_OS_COMMON_FLAGS += PLATFORM=hikey CFG_CONSOLE_UART=$(CFG_SW_CONSOLE_UART)
 OPTEE_OS_CLEAN_COMMON_FLAGS += PLATFORM=hikey
 
 optee-os: optee-os-common
diff --git a/hikey_debian.mk b/hikey_debian.mk
index b212c9edb7d7134a8ec86be4e9ef25665429f194..4fedd2a9bb2c75b3d7ea8003b6d62be109798a76 100644
--- a/hikey_debian.mk
+++ b/hikey_debian.mk
@@ -184,7 +184,7 @@ linux-cleaner: linux-cleaner-common
 ################################################################################
 # OP-TEE
 ################################################################################
-OPTEE_OS_COMMON_FLAGS += PLATFORM=hikey CFG_TEE_TA_LOG_LEVEL=3 CFG_CONSOLE_UART=$(CFG_SW_CONSOLE_UART)
+OPTEE_OS_COMMON_FLAGS += PLATFORM=hikey CFG_CONSOLE_UART=$(CFG_SW_CONSOLE_UART)
 OPTEE_OS_CLEAN_COMMON_FLAGS += PLATFORM=hikey
 
 optee-os: optee-os-common
diff --git a/qemu_v8.mk b/qemu_v8.mk
index 90abc1863b95a44281fa041588fbe9e1c70ed977..7125bda83a01e4644d2044ff89f35c35aeacccdd 100644
--- a/qemu_v8.mk
+++ b/qemu_v8.mk
@@ -122,7 +122,7 @@ linux-cleaner: linux-cleaner-common
 # OP-TEE
 ################################################################################
 OPTEE_OS_COMMON_FLAGS += PLATFORM=vexpress-qemu_armv8a CFG_ARM64_core=y \
-			 DEBUG=0 CFG_PM_DEBUG=0 CFG_TEE_CORE_LOG_LEVEL=3
+			 DEBUG=0 CFG_PM_DEBUG=0
 optee-os: optee-os-common
 
 OPTEE_OS_CLEAN_COMMON_FLAGS += PLATFORM=vexpress-qemu_armv8a