diff --git a/libopenjpeg/opj_malloc.h b/libopenjpeg/opj_malloc.h
index 0b1d4fc1..f989b87f 100644
--- a/libopenjpeg/opj_malloc.h
+++ b/libopenjpeg/opj_malloc.h
@@ -84,7 +84,7 @@ Allocate memory aligned to a 16 byte boundry
 	#if defined(__sun)
 		#define HAVE_MEMALIGN
 	/* Linux x86_64 and OSX always align allocations to 16 bytes */
-	#elif !defined(__amd64__) && !defined(__APPLE__)	
+	#elif !defined(__amd64__) && !defined(__APPLE__) && !defined(_AIX)
 		#define HAVE_MEMALIGN
 		#include <malloc.h>			
 	#endif