diff --git a/Makefile.ctr b/Makefile.ctr
index 4b1c034361..9a2ee1cfc9 100644
--- a/Makefile.ctr
+++ b/Makefile.ctr
@@ -177,9 +177,9 @@ NM      := $(PREFIX)nm
 LD      := $(CXX)
 
 ifeq ($(strip $(CTRBANNERTOOL)),)
-	ifneq ($(findstring Linux,$(shell uname -a)),)
+	ifneq ($(findstring Linux,$(shell uname)),)
 		BANNERTOOL = pkg/ctr/tools/bannertool-linux
-	else ifneq ($(findstring Darwin,$(shell uname -a)),)
+	else ifneq ($(findstring Darwin,$(shell uname)),)
 		BANNERTOOL = pkg/ctr/tools/bannertool-mac
 	else
 		BANNERTOOL = pkg/ctr/tools/bannertool.exe
@@ -189,9 +189,9 @@ else
 endif
 
 ifeq ($(strip $(CTRMAKEROM)),)
-	ifneq ($(findstring Linux,$(shell uname -a)),)
+	ifneq ($(findstring Linux,$(shell uname)),)
 		MAKEROM    = pkg/ctr/tools/makerom-linux
-	else ifneq ($(findstring Darwin,$(shell uname -a)),)
+	else ifneq ($(findstring Darwin,$(shell uname)),)
 		MAKEROM    = pkg/ctr/tools/makerom-mac
 	else
 		MAKEROM    = pkg/ctr/tools/makerom.exe
diff --git a/Makefile.ctr.salamander b/Makefile.ctr.salamander
index 2440d044f9..f356cd9e78 100644
--- a/Makefile.ctr.salamander
+++ b/Makefile.ctr.salamander
@@ -123,9 +123,9 @@ NM      := $(PREFIX)nm
 LD      := $(CXX)
 
 ifeq ($(strip $(CTRBANNERTOOL)),)
-	ifneq ($(findstring Linux,$(shell uname -a)),)
+	ifneq ($(findstring Linux,$(shell uname)),)
 		BANNERTOOL = pkg/ctr/tools/bannertool-linux
-	else ifneq ($(findstring Darwin,$(shell uname -a)),)
+	else ifneq ($(findstring Darwin,$(shell uname)),)
 		BANNERTOOL = pkg/ctr/tools/bannertool-mac
 	else
 		BANNERTOOL = pkg/ctr/tools/bannertool.exe
@@ -135,9 +135,9 @@ else
 endif
 
 ifeq ($(strip $(CTRMAKEROM)),)
-	ifneq ($(findstring Linux,$(shell uname -a)),)
+	ifneq ($(findstring Linux,$(shell uname)),)
 		MAKEROM    = pkg/ctr/tools/makerom-linux
-	else ifneq ($(findstring Darwin,$(shell uname -a)),)
+	else ifneq ($(findstring Darwin,$(shell uname)),)
 		MAKEROM    = pkg/ctr/tools/makerom-mac
 	else
 		MAKEROM    = pkg/ctr/tools/makerom.exe