diff --git a/Makefile b/Makefile
index 78aa343..a67309f 100644
--- a/Makefile
+++ b/Makefile
@@ -195,16 +195,22 @@ else ifeq ($(platform), psl1ght)
 else ifeq ($(platform), psp1)
 	TARGET := $(TARGET_NAME)_libretro_psp1.a
 	CC = psp-gcc$(EXE_EXT)
-	CC_AS = psp-gcc$(EXE_EXT)
-	CXX = psp-g++$(EXE_EXT)
 	AR = psp-ar$(EXE_EXT)
 	PLATFORM_DEFINES := -DPSP
 	CFLAGS += -G0
-	CXXFLAGS += -G0
 	STATIC_LINKING = 1
 	HAVE_COMPAT = 1
 	EXTRA_INCLUDES := -I$(shell psp-config --pspsdk-path)/include
 
+# Vita
+else ifeq ($(platform), vita)
+	EXT=a
+   TARGET := $(TARGET_NAME)_libretro_$(platform).$(EXT)
+	CC = arm-vita-eabi-gcc$(EXE_EXT)
+	AR = arm-vita-eabi-ar$(EXE_EXT)
+   PLATFORM_DEFINES := -DVITA
+   STATIC_LINKING = 1
+
 # CTR (3DS)
 else ifeq ($(platform), ctr)
 	EXT=a
@@ -219,15 +225,6 @@ else ifeq ($(platform), ctr)
    CFLAGS += -D_3DS
    STATIC_LINKING=1
 
-# Vita
-else ifeq ($(platform), vita)
-	EXT=a
-   TARGET := $(TARGET_NAME)_libretro_$(platform).$(EXT)
-	CC = arm-vita-eabi-gcc$(EXE_EXT)
-	AR = arm-vita-eabi-ar$(EXE_EXT)
-   PLATFORM_DEFINES := -DVITA
-   STATIC_LINKING = 1
-
 # Xbox 360
 else ifeq ($(platform), xenon)
 	TARGET := $(TARGET_NAME)_libretro_xenon360.a
diff --git a/atari800/src/util.c b/atari800/src/util.c
index 2129f26..e12a7a5 100644
--- a/atari800/src/util.c
+++ b/atari800/src/util.c
@@ -53,6 +53,8 @@
 
 #ifdef VITA
 #include <psp2/kernel/threadmgr.h>
+#elif defined(PSP)
+#include <pspthreadman.h>
 #endif
 
 #include "atari.h"
@@ -484,7 +486,7 @@ void Util_sleep(double s)
 #if defined(WIIU)
 /* no need to sleep on retroarch (we are awake) so bypass it for wiiu */ 
 return;
-#elif defined(VITA)
+#elif defined(VITA) || defined(PSP)
    sceKernelDelayThread(1e6 * s);
 #else
 
diff --git a/libretro/config.h b/libretro/config.h
index d241fe3..6452081 100644
--- a/libretro/config.h
+++ b/libretro/config.h
@@ -577,7 +577,7 @@
    code using `volatile' can become incorrect without. Disable with care. */
 /* #undef volatile */
 
-#ifdef VITA
+#if defined(VITA) || defined(PSP)
 
 #undef HAVE_CHMOD
 
diff --git a/libretro/libretro-common/libco/libco.c b/libretro/libretro-common/libco/libco.c
index 8d6f934..cbc995c 100644
--- a/libretro/libretro-common/libco/libco.c
+++ b/libretro/libretro-common/libco/libco.c
@@ -24,6 +24,8 @@
     #include "ppc.c"
   #elif defined(__aarch64__)
     #include "aarch64.c"
+  #elif defined(PSP)
+    #include "psp1.c"
   #elif defined VITA
     #include "scefiber.c"
   #elif defined(__ARM_EABI__) || defined(__arm__)
diff --git a/libretro/libretro-common/libco/psp1.c b/libretro/libretro-common/libco/psp1.c
new file mode 100644
index 0000000..45850a4
--- /dev/null
+++ b/libretro/libretro-common/libco/psp1.c
@@ -0,0 +1,45 @@
+#define LIBCO_C
+#include "libco.h"
+
+#include <stdlib.h>
+#include <pspthreadman.h>
+
+/* Since cothread_t is a void pointer it must contain an address. We can't return a reference to a local variable
+ * because it would go out of scope, so we create a static variable instead so we can return a reference to it.
+ */
+static SceUID active_thread_id = 0;
+
+cothread_t co_active()
+{
+  active_thread_id = sceKernelGetThreadId();
+  return &active_thread_id;
+}
+
+cothread_t co_create(unsigned int size, void (*entrypoint)(void))
+{
+  /* Similar scenario as with active_thread_id except there will only be one active_thread_id while there could be many
+   * new threads each with their own handle, so we create them on the heap instead and delete them manually when they're
+   * no longer needed in co_delete().
+   */
+  cothread_t handle = malloc(sizeof(cothread_t));
+
+  /* SceKernelThreadEntry has a different signature than entrypoint, but in practice this seems to work */
+  SceUID new_thread_id = sceKernelCreateThread("cothread", (SceKernelThreadEntry)entrypoint, 0x12, size, 0, NULL);
+  sceKernelStartThread(new_thread_id, 0, NULL);
+
+  *(SceUID *)handle = new_thread_id;
+  return handle;
+}
+
+void co_delete(cothread_t handle)
+{
+  sceKernelTerminateDeleteThread(*(SceUID *)handle);
+  free(handle);
+}
+
+void co_switch(cothread_t handle)
+{
+  sceKernelWakeupThread(*(SceUID *)handle);
+  /* Sleep the currently active thread so the new thread can start */
+  sceKernelSleepThread();
+}
\ No newline at end of file