diff --git a/configure b/configure
diff --git a/loader/Makefile b/loader/Makefile
index 6aa6ac0..c04a07e 100644
--- a/loader/Makefile
+++ b/loader/Makefile
@@ -3,6 +3,7 @@ include ../config.mak
 LIBNAME_COMMON = libloader.a
 
 #CFLAGS+=-Ddbg_printf=__vprintf -DTRACE=__vprintf -DDETAILED_OUT
+CFLAGS-$(QTX_EMULATION) += -DEMU_QTX_API
 
 SRCS_COMMON  = driver.c afl.c vfl.c
 SRCS_COMMON-$(QTX_EMULATION)   += wrapper.S
diff --git a/loader/module.c b/loader/module.c
index e316cf0..2023acb 100644
--- a/loader/module.c
+++ b/loader/module.c
@@ -9,8 +9,8 @@
  */
 
 // define for quicktime calls debugging and/or MacOS-level emulation:
-#ifndef __APPLE__
-#define EMU_QTX_API
+#ifdef __APPLE__
+#undef EMU_QTX_API
 #endif /* __APPLE__ */
 
 // define for quicktime debugging (verbose logging):