diff --git a/src/wasapi.c b/src/wasapi.c
index f77d944f..60664969 100644
--- a/src/wasapi.c
+++ b/src/wasapi.c
@@ -100,14 +100,14 @@ static const IID IID_ISimpleAudioVolume = {
     0x87ce5498, 0x68d6, 0x44e5,{ 0x92, 0x15, 0x6d, 0xa4, 0x7e, 0xf8, 0x83, 0xd8 }
 };
 
-+static const IID IID_IAudioEndpointVolume = {
-    +    //MIDL_INTERFACE("5CDF2C82-841E-4546-9722-0CF74078229A")
-    +0x5cdf2c82, 0x841e, 0x4546, {0x97, 0x22, 0x0c, 0xf7, 0x40, 0x78, 0x22, 0x9a}
-+};
-+static const IID IID_IAudioEndpointVolumeCallback = {
-    +    //MIDL_INTERFACE("657804FA-D6AD-4496-8A60-352752AF4F89")
-    +0x657804fa, 0xd6ad, 0x4496, {0x8a, 0x60, 0x35, 0x27, 0x52, 0xaf, 0x4f, 0x89}
-+};
+static const IID IID_IAudioEndpointVolume = {
+    //MIDL_INTERFACE("5CDF2C82-841E-4546-9722-0CF74078229A")
+    0x5cdf2c82, 0x841e, 0x4546, {0x97, 0x22, 0x0c, 0xf7, 0x40, 0x78, 0x22, 0x9a}
+};
+static const IID IID_IAudioEndpointVolumeCallback = {
+    //MIDL_INTERFACE("657804FA-D6AD-4496-8A60-352752AF4F89")
+    0x657804fa, 0xd6ad, 0x4496, {0x8a, 0x60, 0x35, 0x27, 0x52, 0xaf, 0x4f, 0x89}
+};
 
 #else
 #define IS_EQUAL_GUID(a, b) IsEqualGUID((a), (b))