diff --git a/doc/background.html b/doc/background.html
index ba9af8d..8f4478d 100644
--- a/doc/background.html
+++ b/doc/background.html
@@ -10,7 +10,7 @@ compromises are made, notably the presence of only one data type
 (float).</P>
 
 <P>Technical documentation is contained in the <A
-HREF="ladspa.h.txt"><CODE>ladspa.h</CODE></A> header file. When
+href="file:///usr/include/ladspa.h"><CODE>ladspa.h</CODE></A> header file. When
 clashes occur between this file and external documentation then the
 header file should be considered the definitive version.</P>
 
diff --git a/doc/index.html b/doc/index.html
index fb7f61b..09a40c1 100644
--- a/doc/index.html
+++ b/doc/index.html
@@ -6,7 +6,7 @@
 <LI><A HREF="download.html">Download</A></LI>
 <LI><A HREF="installation.html">Installation</A></LI>
 <LI><A HREF="shared_plugins.html">How to Share Plugins between Hosts</A></LI>
-<LI><A HREF="ladspa.h.txt">LADSPA API Header File</A></LI>
+<LI><A href="file:///usr/include/ladspa.h">LADSPA API Header File</A></LI>
 <LI><A HREF="license.html">License (LGPL) for This Release</A></LI>
 <LI><A HREF="example_plugins.html">Example Plugins</A></LI>
 <LI><A HREF="changes.html">Change History</A></LI>
diff --git a/doc/installation.html b/doc/installation.html
index 1b0b339..4db5781 100644
--- a/doc/installation.html
+++ b/doc/installation.html
@@ -4,7 +4,7 @@
 number of hosts and example plugins. Go to the <CODE>src/</CODE>
 directory and type <CODE>make</CODE> to build and test them.</P>
 
-<P>The <A HREF="ladspa.h.txt"><CODE>ladspa.h</CODE> API header
+<P>The <A href="file:///usr/include/ladspa.h"><CODE>ladspa.h</CODE> API header
 file</A> is needed to build hosts and plugins. It may be useful to
 install it in <CODE>/usr/local/include/</CODE> or
 <CODE>/usr/include/</CODE>. The programs generated in the
diff --git a/doc/overview.html b/doc/overview.html
index e19e21f..a85d689 100644
--- a/doc/overview.html
+++ b/doc/overview.html
@@ -8,7 +8,7 @@ against a range of host applications.</P>
 
 <P>Definitive technical documentation on LADSPA plugins for both host
 and plugin writers is contained within copious comments in the <A
-HREF="ladspa.h.txt"><CODE>ladspa.h</CODE></A> header file.</P>
+href="file:///usr/include/ladspa.h"><CODE>ladspa.h</CODE></A> header file.</P>
 
 <P>This SDK provides:</P>
 
diff --git a/src/makefile b/src/makefile
index 886237f..2ed10ed 100644
--- a/src/makefile
+++ b/src/makefile
@@ -15,7 +15,7 @@ INSTALL_BINARY_DIR	=	/usr/bin/
 
 INCLUDES	=	-I.
 LIBRARIES	=	-ldl -lm
-CFLAGS		=	$(INCLUDES) -Wall -Werror -O3 -fPIC
+CFLAGS		=	$(INCLUDES) -Wall -Werror $(RPM_OPT_FLAGS) -fPIC -DPLUGINDIR=$(PLUGINDIR)
 CXXFLAGS	=	$(CFLAGS)
 PLUGINS		=	../plugins/amp.so				\
 			../plugins/delay.so				\
@@ -59,9 +59,9 @@ test:	/tmp/test.wav ../snd/noise.wav always
 	@echo Test complete.
 
 install:	targets
-	-mkdirhier $(INSTALL_PLUGINS_DIR)
-	-mkdirhier $(INSTALL_INCLUDE_DIR)
-	-mkdirhier $(INSTALL_BINARY_DIR)
+	-mkdir -p $(INSTALL_PLUGINS_DIR)
+	-mkdir -p $(INSTALL_INCLUDE_DIR)
+	-mkdir -p $(INSTALL_BINARY_DIR)
 	cp ../plugins/* $(INSTALL_PLUGINS_DIR)
 	cp ladspa.h $(INSTALL_INCLUDE_DIR)
 	cp ../bin/* $(INSTALL_BINARY_DIR)