--- defaults.make.orig	2019-07-12 21:30:24.578912914 +0200
+++ defaults.make	2019-07-12 21:30:35.702896795 +0200
@@ -424,7 +424,7 @@
 	$(call echo, >>, $@,# define C_TARGET_SHARE_HOME "$(TARGET_PREFIX)/share")
 	$(call echo, >>, $@,#endif)
 	$(call echo, >>, $@,#ifndef C_TARGET_INCLUDE_HOME)
-	$(call echo, >>, $@,# define C_TARGET_INCLUDE_HOME "$(TARGET_PREFIX)/include/chicken")
+	$(call echo, >>, $@,# define C_TARGET_INCLUDE_HOME "$(TARGET_PREFIX)/include/chicken$(PROGRAM_SUFFIX)")
 	$(call echo, >>, $@,#endif)
 	$(call echo, >>, $@,#ifndef C_TARGET_STATIC_LIB_HOME)
 	$(call echo, >>, $@,# define C_TARGET_STATIC_LIB_HOME "$(TARGET_PREFIX)/lib")