diff --git a/Makefile.mgw b/Makefile.mgw
index 6f53efd55d8..294f35559ff 100644
--- a/Makefile.mgw
+++ b/Makefile.mgw
@@ -58,9 +58,14 @@
 .PHONY : all libgl clean realclean
 
 CPU ?= pentium
-
-# when -std=c99 mingw will not define WIN32
-CFLAGS = -Wall -W -Werror -pedantic -std=c99 -DWIN32
+
+ifeq ($(ICD),1)
+  # when -std=c99 mingw will not define WIN32
+  CFLAGS = -Wall -W -Werror -pedantic -std=c99 -DWIN32
+else
+  # I love c89
+  CFLAGS = -Wall -W -pedantic
+endif
 CFLAGS += -O2 -ffast-math -mcpu=$(CPU)
 
 export CFLAGS