diff --git a/Makefile.common b/Makefile.common
index a6fcc81d02..5d92b93a52 100644
--- a/Makefile.common
+++ b/Makefile.common
@@ -132,6 +132,7 @@ OBJ += frontend/frontend.o \
 		libretro-common/file/dir_list.o \
 		libretro-common/string/string_list.o \
 		libretro-common/string/stdstring.o \
+		libretro-common/memmap/memmap.o \
 		dir_list_special.o \
 		file_ops.o \
 		libretro-common/file/nbio/nbio_stdio.o \
diff --git a/camera/drivers/video4linux2.c b/camera/drivers/video4linux2.c
index 1f103f7a1e..aa8a837d75 100644
--- a/camera/drivers/video4linux2.c
+++ b/camera/drivers/video4linux2.c
@@ -27,12 +27,12 @@
 #include <sys/stat.h>
 #include <sys/types.h>
 #include <sys/time.h>
-#include <sys/mman.h>
 #include <sys/ioctl.h>
 
 #include <asm/types.h>
 #include <linux/videodev2.h>
 
+#include <memmap.h>
 #include <retro_miscellaneous.h>
 #include <gfx/scaler/scaler.h>
 
diff --git a/libretro-common/include/memmap.h b/libretro-common/include/memmap.h
index 492ace6636..2dea42bb66 100644
--- a/libretro-common/include/memmap.h
+++ b/libretro-common/include/memmap.h
@@ -34,6 +34,15 @@
 #include <sys/mman.h>
 #endif
 
+#if !defined(HAVE_MMAN)
+#define PROT_EXEC       0x04
+#define MAP_FAILED      0
+#define PROT_READ       0
+#define PROT_WRITE      0
+#define MAP_PRIVATE     0
+#define MAP_ANONYMOUS   0
+#endif
+
 #ifndef MAP_ANONYMOUS
 #define MAP_ANONYMOUS MAP_ANON
 #endif
diff --git a/libretro-common/memmap/memmap.c b/libretro-common/memmap/memmap.c
index cfc4974459..10f2bb0098 100644
--- a/libretro-common/memmap/memmap.c
+++ b/libretro-common/memmap/memmap.c
@@ -125,13 +125,6 @@ int mprotect(void *addr, size_t len, int prot)
 }
 
 #elif !defined(HAVE_MMAN)
-#define PROT_EXEC       0x04
-#define MAP_FAILED      0
-#define PROT_READ       0
-#define PROT_WRITE      0
-#define MAP_PRIVATE     0
-#define MAP_ANONYMOUS   0
-
 void* mmap(void *desired_addr, size_t len, int mmap_prot, int mmap_flags, int fildes, size_t off)
 {
    return malloc(len);
@@ -162,7 +155,11 @@ int memsync(void *start, void *end)
    __clear_cache(start, end);
    return 0;
 #elif defined(HAVE_MMAN)
-   return msync(start, len, MS_SYNC | MS_CACHE_ONLY | MS_INVALIDATE_ICACHE);
+   return msync(start, len, MS_SYNC | MS_INVALIDATE
+#ifdef __QNX__
+         MS_CACHE_ONLY
+#endif
+         );
 #else
    return 0;
 #endif