diff --git a/src/main/target/ALIENFLIGHTF3/hardware_revision.c b/src/main/target/ALIENFLIGHTF3/hardware_revision.c
index 4773d5bbf8..89dc02c8c8 100644
--- a/src/main/target/ALIENFLIGHTF3/hardware_revision.c
+++ b/src/main/target/ALIENFLIGHTF3/hardware_revision.c
@@ -44,7 +44,7 @@ void detectHardwareRevision(void)
     IOInit(RXDetectPin, OWNER_SYSTEM, 0);
     IOConfigGPIO(RXDetectPin, IOCFG_IPU);
 
-    delayMicroseconds(10);  // allow configuration to settle
+    delayMicroseconds(40);  // allow configuration to settle
 
     // Check hardware revision
     if (IORead(HWDetectPin)) {
diff --git a/src/main/target/ALIENFLIGHTF4/hardware_revision.c b/src/main/target/ALIENFLIGHTF4/hardware_revision.c
index fa333bd275..6bf2bc9ec7 100644
--- a/src/main/target/ALIENFLIGHTF4/hardware_revision.c
+++ b/src/main/target/ALIENFLIGHTF4/hardware_revision.c
@@ -37,7 +37,7 @@ void detectHardwareRevision(void)
     IOInit(HWDetectPin, OWNER_SYSTEM, 0);
     IOConfigGPIO(HWDetectPin, IOCFG_IPU);
 
-    delayMicroseconds(10);  // allow configuration to settle
+    delayMicroseconds(40);  // allow configuration to settle
 
     // Check hardware revision
     if (IORead(HWDetectPin)) {
diff --git a/src/main/target/ALIENFLIGHTNGF7/hardware_revision.c b/src/main/target/ALIENFLIGHTNGF7/hardware_revision.c
index 77ec75696b..6238acfb2a 100644
--- a/src/main/target/ALIENFLIGHTNGF7/hardware_revision.c
+++ b/src/main/target/ALIENFLIGHTNGF7/hardware_revision.c
@@ -38,7 +38,7 @@ void detectHardwareRevision(void)
     IOInit(HWDetectPin, OWNER_SYSTEM, 0);
     IOConfigGPIO(HWDetectPin, IOCFG_IPU);
 
-    delayMicroseconds(10);  // allow configuration to settle
+    delayMicroseconds(40);  // allow configuration to settle
 
     // Check hardware revision
     if (IORead(HWDetectPin)) {