diff --git a/plugins/ProM/Makefile b/plugins/ProM/Makefile
index c67fb1d..c3895fa 100644
--- a/plugins/ProM/Makefile
+++ b/plugins/ProM/Makefile
@@ -126,7 +126,6 @@ BASE_FLAGS += -DUSE_THREADS=1
 # Experimental
 # BASE_FLAGS += -DHAVE_LLVM=1
 ifeq ($(WINDOWS),true)
-BASE_FLAGS += -Daligned_alloc=_aligned_malloc
 BASE_FLAGS += -DDLLEXPORT=
 BASE_FLAGS += -DprojectM_FONT_TITLE='"fonts/Vera.tff"'
 BASE_FLAGS += -DprojectM_FONT_MENU='"fonts/VeraMono.ttf"'