diff --git a/installer/Makefile b/installer/Makefile
index 33ce582c72..3b963bf55f 100644
--- a/installer/Makefile
+++ b/installer/Makefile
@@ -193,6 +193,7 @@ endif
 ifeq ($(OS_TARGET),os2)
 override TARGET_PROGRAMS+=install
 endif
+override CLEAN_UNITS+=scroll
 ifeq ($(OS_TARGET),linux)
 override CLEAN_FILES+=installer.pas
 endif
@@ -1303,5 +1304,5 @@ override COMPILER+=-dFVISION
 endif
 installer.pas: install.pas
 	$(COPY) install.pas installer.pas
-install$(EXEEXT) : install.pas scroll$(PPUEXT)
-installer$(EXEEXT) : installer.pas scroll$(PPUEXT)
+install$(EXEEXT) : install.pas scroll.pas
+installer$(EXEEXT) : installer.pas scroll.pas
diff --git a/installer/Makefile.fpc b/installer/Makefile.fpc
index ed9332deb3..bace7c605d 100644
--- a/installer/Makefile.fpc
+++ b/installer/Makefile.fpc
@@ -13,6 +13,7 @@ programs_os2=install
 programs_linux=installer
 
 [clean]
+units=scroll
 files_linux=installer.pas
 
 [require]
@@ -39,6 +40,6 @@ endif
 installer.pas: install.pas
         $(COPY) install.pas installer.pas
 
-install$(EXEEXT) : install.pas scroll$(PPUEXT)
+install$(EXEEXT) : install.pas scroll.pas
 
-installer$(EXEEXT) : installer.pas scroll$(PPUEXT)
+installer$(EXEEXT) : installer.pas scroll.pas