1 files changed, 7 insertions, 0 deletions
diff --git a/OpenAL32/Include/alFilter.h b/OpenAL32/Include/alFilter.h
index b1a61d59..038304e8 100644
--- a/OpenAL32/Include/alFilter.h
+++ b/OpenAL32/Include/alFilter.h
@@ -14,11 +14,18 @@ extern "C" {
 #define AL_FILTER_HIGHPASS                                 0x0002
 #define AL_FILTER_BANDPASS                                 0x0003
 
+#define AL_LOWPASS_GAIN                                    0x0001
+#define AL_LOWPASS_GAINHF                                  0x0002
+
+
 typedef struct ALfilter_struct
 {
     // Filter type (AL_FILTER_NULL, ...)
     ALenum type;
 
+    ALfloat Gain;
+    ALfloat GainHF;
+
     // Index to itself
     ALuint filter;