diff --git a/Makefile.src.in b/Makefile.src.in
--- a/Makefile.src.in
+++ b/Makefile.src.in
@@ -224,7 +224,11 @@ endif
 
 $(TTD): rev.o $(OBJS) $(CONFIG_CACHE_LINKER)
 	$(E) '$(STAGE) Linking $@'
+ifeq ($(OS), PSP)
+	$(Q)$(CC_HOST) $(LDFLAGS) rev.o $(OBJS) $(LIBS) -o $@
+else
 	$(Q)$(CXX_HOST) $(LDFLAGS) rev.o $(OBJS) $(LIBS) -o $@
+endif
 ifdef STRIP
 	$(Q)$(STRIP) $@
 endif
diff --git a/config.lib b/config.lib
--- a/config.lib
+++ b/config.lib
@@ -606,6 +606,9 @@ make_cflags_and_ldflags() {
 		# Each debug level reduces the optimalization by a bit
 		if [ $enable_debug -ge 1 ]; then
 			CFLAGS="$CFLAGS -g -D_DEBUG"
+			if [ "$os" = "PSP" ]; then
+				CFLAGS="$CFLAGS -G0"
+			fi
 		fi
 		if [ $enable_debug -ge 2 ]; then
 			CFLAGS="$CFLAGS -fno-inline"
@@ -668,6 +671,9 @@ make_cflags_and_ldflags() {
 	if [ "$os" = "PSP" ]; then
 		CFLAGS="$CFLAGS -I`$psp_config -p`/include"
 		LDFLAGS="$LDFLAGS -L`$psp_config -p`/lib"
+
+		CFLAGS="$CFLAGS -fno-exceptions -fno-rtti -D_PSP_FW_VERSION=150"
+		LIBS="$LIBS -D_PSP_FW_VERSION=150 -lpspdebug -lpspdisplay -lpspge -lpspctrl -lpspsdk -lpspnet -lpspnet_inet -lpspnet_apctl -lpspnet_resolver -lpsputility -lpspuser -lpspkernel -lm"
 	fi
 
 	if [ "$os" = "MORPHOS" ]; then
diff --git a/src/thread.cpp b/src/thread.cpp
--- a/src/thread.cpp
+++ b/src/thread.cpp
@@ -5,7 +5,7 @@
 #include <stdlib.h>
 #include "helpers.hpp"
 
-#if defined(__AMIGA__) || defined(__MORPHOS__) || defined(NO_THREADS)
+#if defined(__AMIGA__) || defined(__MORPHOS__) || defined(PSP) || defined(NO_THREADS)
 OTTDThread *OTTDCreateThread(OTTDThreadFunc function, void *arg) { return NULL; }
 void *OTTDJoinThread(OTTDThread *t) { return NULL; }
 void OTTDExitThread(void) { NOT_REACHED(); };