diff --git a/src/utils/fluidsynth_priv.h b/src/utils/fluidsynth_priv.h
index 32e166d9..d03a23f0 100644
--- a/src/utils/fluidsynth_priv.h
+++ b/src/utils/fluidsynth_priv.h
@@ -225,7 +225,7 @@ do { strncpy(_dst,_src,_n); \
 #define M_LN10 2.3025850929940456840179914546844
 #endif
 
-#ifdef DEBUG
+#ifdef DEBUG && !defined(NDEBUG)
 #define FLUID_ASSERT(a) g_assert(a)
 #else
 #define FLUID_ASSERT(a)