diff --git a/tools/cooja/config/external_tools_win32.config b/tools/cooja/config/external_tools_win32.config
index 012750a63..236c5cffb 100644
--- a/tools/cooja/config/external_tools_win32.config
+++ b/tools/cooja/config/external_tools_win32.config
@@ -4,7 +4,7 @@ PATH_MAKE = make
 PATH_LINKER = ld
 PATH_AR=ar
 PATH_SHELL = sh
-PATH_C_COMPILER = gcc
+PATH_C_COMPILER=mingw32-gcc
 PATH_OBJDUMP=objdump
 PATH_OBJCOPY=objcopy
 OBJDUMP_ARGS=-h
@@ -14,9 +14,9 @@ CMD_GREP_INTERFACES = grep '^SIM_INTERFACE([^,]*,' -o -d skip -D skip -H -r
 REGEXP_PARSE_INTERFACES = ([^/]*.c):SIM_INTERFACE\\(([^,]*),
 CMD_GREP_SENSORS = grep '^SENSORS_SENSOR([^,]*,' -o -d skip -D skip -H -r
 REGEXP_PARSE_SENSORS = ([^/]*.c):SENSORS_SENSOR\\(([^,]*),
-COMPILER_ARGS = -mno-cygwin -Wall -I'$(JAVA_HOME)/include' -I'$(JAVA_HOME)/include/win32' -fno-builtin-printf
-LINK_COMMAND_1 = gcc -mno-cygwin -shared -Wl,-Map=$(MAPFILE) -Wl,--add-stdcall-alias -o $(LIBFILE)
-LINK_COMMAND_2 = -L/usr/lib/mingw -lmsvcrt
+COMPILER_ARGS=-D__int64\="long long" -Wall -I'$(JAVA_HOME)/include' -I'$(JAVA_HOME)/include/win32' -fno-builtin-printf
+LINK_COMMAND_1 = mingw32-gcc -shared -Wl,-Map=$(MAPFILE) -Wl,--add-stdcall-alias -o $(LIBFILE)
+LINK_COMMAND_2 = -L/usr/lib/mingw
 AR_COMMAND_1 = ar rcf $(ARFILE)
 AR_COMMAND_2 = 
 CONTIKI_STANDARD_PROCESSES = sensors_process;etimer_process
@@ -40,3 +40,5 @@ COMMAND_DATA_START = ^([0-9A-Fa-f]*)[ \t]D[ \t].*_data_start__$
 COMMAND_DATA_END = ^([0-9A-Fa-f]*)[ \t]D[ \t].*_data_end__$
 COMMAND_BSS_START = ^([0-9A-Fa-f]*)[ \t]B[ \t].*_bss_start__$
 COMMAND_BSS_END = ^([0-9A-Fa-f]*)[ \t]B[ \t].*_bss_end__$
+
+VISUALIZER_DEFAULT_SKINS=se.sics.cooja.plugins.skins.IDVisualizerSkin;se.sics.cooja.plugins.skins.GridVisualizerSkin