diff --git a/src/Makefile b/src/Makefile
index ce1b04875..8a4d63182 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -456,21 +456,21 @@ stamp_header:
 	@echo "Generate Version-stamp:"
 	@echo "//Automatically generated file (Makefile) - do not edit" > stamp-open9x.h
 	@echo "#define DATE_STR \"`date +%Y-%m-%d`\"" >> stamp-open9x.h
-	@echo "#define TIME_STR \"`date +%H:%I:%S`\"" >> stamp-open9x.h
+	@echo "#define TIME_STR \"`date +%H:%M:%S`\"" >> stamp-open9x.h
 	@echo "#define VERS_STR \"$(MAJ_VER).$(MIN_VER)-$(MODS)\"" >> stamp-open9x.h
 	@echo "#define SVN_STR  \"open9x-r$(SVNREV)\"" >> stamp-open9x.h
 	@cat stamp-open9x.h
 	
 stamp:
 	@echo "#define DATE_STR \"`date +%Y-%m-%d`\"" > ../stamp-open9x.txt
-	@echo "#define TIME_STR \"`date +%H:%I:%S`\"" >> ../stamp-open9x.txt
+	@echo "#define TIME_STR \"`date +%H:%M:%S`\"" >> ../stamp-open9x.txt
 	@echo "#define VERS_STR \"$(MAJ_VER).$(MIN_VER)\"" >> ../stamp-open9x.txt
 	@echo "#define SVN_VERS  \"open9x-r$(SVNREV)\"" >> ../stamp-open9x.txt
 	@cat ../stamp-open9x.txt
 	
 arm-stamp:
 	@echo "#define DATE_STR \"`date +%Y-%m-%d`\"" > ../stamp-open9x-arm.txt
-	@echo "#define TIME_STR \"`date +%H:%I:%S`\"" >> ../stamp-open9x-arm.txt
+	@echo "#define TIME_STR \"`date +%H:%M:%S`\"" >> ../stamp-open9x-arm.txt
 	@echo "#define VERS_STR \"$(MAJ_VER).$(MIN_VER)\"" >> ../stamp-open9x-arm.txt
 	@echo "#define SVN_VERS  \"open9x-r$(SVNREV)\"" >> ../stamp-open9x-arm.txt
 	@cat ../stamp-open9x-arm.txt