diff --git a/nuttx-configs/aerocore/nsh/Make.defs b/nuttx-configs/aerocore/nsh/Make.defs
index c7a1b71bbd..c1f5a8ac42 100644
--- a/nuttx-configs/aerocore/nsh/Make.defs
+++ b/nuttx-configs/aerocore/nsh/Make.defs
@@ -119,6 +119,7 @@ endif
 ARCHCFLAGS		 = -std=gnu99
 ARCHCXXFLAGS		 = -fno-exceptions -fno-rtti -std=gnu++0x
 ARCHWARNINGS		 = -Wall \
+			   -Wno-sign-compare \
 			   -Wextra \
 			   -Wdouble-promotion \
 			   -Wshadow \
diff --git a/nuttx-configs/px4fmu-v1/nsh/Make.defs b/nuttx-configs/px4fmu-v1/nsh/Make.defs
index f055cfddf8..5e28f2473d 100644
--- a/nuttx-configs/px4fmu-v1/nsh/Make.defs
+++ b/nuttx-configs/px4fmu-v1/nsh/Make.defs
@@ -119,6 +119,7 @@ endif
 ARCHCFLAGS		 = -std=gnu99
 ARCHCXXFLAGS		 = -fno-exceptions -fno-rtti -std=gnu++0x
 ARCHWARNINGS		 = -Wall \
+			   -Wno-sign-compare \
 			   -Wextra \
 			   -Wdouble-promotion \
 			   -Wshadow \
diff --git a/nuttx-configs/px4fmu-v2/nsh/Make.defs b/nuttx-configs/px4fmu-v2/nsh/Make.defs
index f660deeca7..99f3b3140d 100644
--- a/nuttx-configs/px4fmu-v2/nsh/Make.defs
+++ b/nuttx-configs/px4fmu-v2/nsh/Make.defs
@@ -119,6 +119,7 @@ endif
 ARCHCFLAGS		 = -std=gnu99
 ARCHCXXFLAGS		 = -fno-exceptions -fno-rtti -std=gnu++0x
 ARCHWARNINGS		 = -Wall \
+			   -Wno-sign-compare \
 			   -Wextra \
 			   -Wdouble-promotion \
 			   -Wshadow \
diff --git a/nuttx-configs/px4io-v1/nsh/Make.defs b/nuttx-configs/px4io-v1/nsh/Make.defs
index e96be6a1f2..b4f5577aed 100644
--- a/nuttx-configs/px4io-v1/nsh/Make.defs
+++ b/nuttx-configs/px4io-v1/nsh/Make.defs
@@ -108,6 +108,7 @@ endif
 ARCHCFLAGS		 = -std=gnu99
 ARCHCXXFLAGS		 = -fno-exceptions -fno-rtti -std=gnu++0x
 ARCHWARNINGS		 = -Wall \
+         -Wno-sign-compare \
 			   -Wextra \
 			   -Wdouble-promotion \
 			   -Wshadow \
diff --git a/nuttx-configs/px4io-v2/nsh/Make.defs b/nuttx-configs/px4io-v2/nsh/Make.defs
index 4a8df27388..51420eb23d 100644
--- a/nuttx-configs/px4io-v2/nsh/Make.defs
+++ b/nuttx-configs/px4io-v2/nsh/Make.defs
@@ -108,6 +108,7 @@ endif
 ARCHCFLAGS		 = -std=gnu99
 ARCHCXXFLAGS		 = -fno-exceptions -fno-rtti -std=gnu++0x
 ARCHWARNINGS		 = -Wall \
+         -Wno-sign-compare \
 			   -Wextra \
 			   -Wdouble-promotion \
 			   -Wshadow \