diff --git a/src/engine/Jambase b/src/engine/Jambase
index 406084ac5..85a362036 100644
--- a/src/engine/Jambase
+++ b/src/engine/Jambase
@@ -721,6 +721,9 @@ else if $(UNIX)
     RELOCATE    ?= true ;
 
     case HPUX :
+    YACC        = ;
+    CFLAGS      += -Ae ;
+    CCFLAGS     += -Ae ;
     RANLIB      ?= "" ;
 
     case INTERIX :
@@ -2294,4 +2297,4 @@ rule makeSuffixed { $(<[1]) = [ FAppendSuffix $(>) : $(<[2]) ] ; }
     if $(JAMFILE) { include $(JAMFILE) ; }
 }
 
-}
\ No newline at end of file
+}
diff --git a/src/engine/jambase.c b/src/engine/jambase.c
index b16214aa9..30b6de83d 100644
--- a/src/engine/jambase.c
+++ b/src/engine/jambase.c
@@ -463,6 +463,9 @@ char *jambase[] = {
 "RANLIB      ?= \"\" ;\n",
 "RELOCATE    ?= true ;\n",
 "case HPUX :\n",
+"YACC        = ;\n",
+"CFLAGS      += -Ae ;\n",
+"CCFLAGS     += -Ae ;\n",
 "RANLIB      ?= \"\" ;\n",
 "case INTERIX :\n",
 "CC          ?= gcc ;\n",