diff --git a/intern/audaspace/FX/AUD_ButterworthReader.cpp b/intern/audaspace/FX/AUD_ButterworthReader.cpp
index adcae87ce9f..2129dfef798 100644
--- a/intern/audaspace/FX/AUD_ButterworthReader.cpp
+++ b/intern/audaspace/FX/AUD_ButterworthReader.cpp
@@ -29,6 +29,10 @@
 #include <cstring>
 #include <cmath>
 
+#ifndef M_PI
+#define M_PI 3.14159265358979323846
+#endif
+
 #define BWPB41 0.76536686473
 #define BWPB42 1.84775906502
 #define CC channels + channel
diff --git a/intern/audaspace/FX/AUD_HighpassReader.cpp b/intern/audaspace/FX/AUD_HighpassReader.cpp
index 8240854fc06..c83a9588edf 100644
--- a/intern/audaspace/FX/AUD_HighpassReader.cpp
+++ b/intern/audaspace/FX/AUD_HighpassReader.cpp
@@ -29,6 +29,10 @@
 #include <cstring>
 #include <cmath>
 
+#ifndef M_PI
+#define M_PI 3.14159265358979323846
+#endif
+
 #define CC channels + channel
 
 AUD_HighpassReader::AUD_HighpassReader(AUD_IReader* reader, float frequency,
diff --git a/intern/audaspace/FX/AUD_LowpassReader.cpp b/intern/audaspace/FX/AUD_LowpassReader.cpp
index 373d0218360..4e8492e098b 100644
--- a/intern/audaspace/FX/AUD_LowpassReader.cpp
+++ b/intern/audaspace/FX/AUD_LowpassReader.cpp
@@ -29,6 +29,10 @@
 #include <cstring>
 #include <cmath>
 
+#ifndef M_PI
+#define M_PI 3.14159265358979323846
+#endif
+
 #define CC channels + channel
 
 AUD_LowpassReader::AUD_LowpassReader(AUD_IReader* reader, float frequency,