diff --git a/Projects/AVRISP-MKII/makefile b/Projects/AVRISP-MKII/makefile
index d62decab94..0675242c09 100644
--- a/Projects/AVRISP-MKII/makefile
+++ b/Projects/AVRISP-MKII/makefile
@@ -245,6 +245,7 @@ CFLAGS += -fno-inline-small-functions
 CFLAGS += -fpack-struct
 CFLAGS += -fshort-enums
 CFLAGS += -fno-strict-aliasing
+CFLAGS += -fno-split-wide-types
 CFLAGS += -Wall
 CFLAGS += -Wstrict-prototypes
 #CFLAGS += -mshort-calls
diff --git a/Projects/Webserver/makefile b/Projects/Webserver/makefile
index 16a5e148fa..175cf1f523 100644
--- a/Projects/Webserver/makefile
+++ b/Projects/Webserver/makefile
@@ -260,6 +260,7 @@ CFLAGS += -fno-inline-small-functions
 CFLAGS += -fpack-struct
 CFLAGS += -fshort-enums
 CFLAGS += -fno-strict-aliasing
+CFLAGS += -fno-split-wide-types
 CFLAGS += -Wall
 CFLAGS += -Wstrict-prototypes
 #CFLAGS += -mshort-calls
diff --git a/Projects/XPLAINBridge/makefile b/Projects/XPLAINBridge/makefile
index 0418414b1d..f58d7966dd 100644
--- a/Projects/XPLAINBridge/makefile
+++ b/Projects/XPLAINBridge/makefile
@@ -247,6 +247,7 @@ CFLAGS += -fno-inline-small-functions
 CFLAGS += -fpack-struct
 CFLAGS += -fshort-enums
 CFLAGS += -fno-strict-aliasing
+CFLAGS += -fno-split-wide-types
 CFLAGS += -Wall
 CFLAGS += -Wstrict-prototypes
 #CFLAGS += -mshort-calls