diff --git a/common/jpeg/turbojpegl.c b/common/jpeg/turbojpegl.c
index 68dd35d..2150a2d 100644
--- a/common/jpeg/turbojpegl.c
+++ b/common/jpeg/turbojpegl.c
@@ -149,6 +149,10 @@
 	#error "TurboJPEG requires JPEG colorspace extensions"
 	#endif
 
+	if(flags&TJ_FORCEMMX) putenv("JSIMD_FORCEMMX=1");
+	else if(flags&TJ_FORCESSE) putenv("JSIMD_FORCESSE=1");
+	else if(flags&TJ_FORCESSE2) putenv("JSIMD_FORCESSE2=1");
+
 	if(setjmp(j->jerr.jb))
 	{  // this will execute if LIBJPEG has an error
 		if(row_pointer) free(row_pointer);
@@ -288,6 +292,10 @@
 
 	if(pitch==0) pitch=width*ps;
 
+	if(flags&TJ_FORCEMMX) putenv("JSIMD_FORCEMMX=1");
+	else if(flags&TJ_FORCESSE) putenv("JSIMD_FORCESSE=1");
+	else if(flags&TJ_FORCESSE2) putenv("JSIMD_FORCESSE2=1");
+
 	if(setjmp(j->jerr.jb))
 	{  // this will execute if LIBJPEG has an error
 		if(row_pointer) free(row_pointer);