diff --git a/lib/rbcodec/codecs/libgme/gb_cpu_run.h b/lib/rbcodec/codecs/libgme/gb_cpu_run.h
index 1ea8b59249..acfd515ca3 100644
--- a/lib/rbcodec/codecs/libgme/gb_cpu_run.h
+++ b/lib/rbcodec/codecs/libgme/gb_cpu_run.h
@@ -129,7 +129,7 @@ int const c10 = 0x10; // cz
 
 	#ifdef BLARGG_BIG_ENDIAN
 		#define R8( n ) (reg.r8_ [n]) 
-	#elif BLARGG_LITTLE_ENDIAN
+	#elif defined(BLARGG_LITTLE_ENDIAN)
 		#define R8( n ) (reg.r8_ [(n) ^ 1]) 
 	#else
 		// Be sure "blargg_endian.h" has been #included in the file that #includes this
diff --git a/lib/rbcodec/codecs/libgme/z80_cpu_run.h b/lib/rbcodec/codecs/libgme/z80_cpu_run.h
index a453487bb0..26c2a1a7b6 100644
--- a/lib/rbcodec/codecs/libgme/z80_cpu_run.h
+++ b/lib/rbcodec/codecs/libgme/z80_cpu_run.h
@@ -131,7 +131,7 @@ int const C01 = 0x01;
 
 #ifdef BLARGG_BIG_ENDIAN
 	#define R8( n, offset ) ((r.r8_ - offset) [n]) 
-#elif BLARGG_LITTLE_ENDIAN
+#elif defined(BLARGG_LITTLE_ENDIAN)
 	#define R8( n, offset ) ((r.r8_ - offset) [(n) ^ 1]) 
 #else
 	#error "Byte order of CPU must be known"