diff --git a/renderdoc/os/posix/apple/apple_threading.cpp b/renderdoc/os/posix/apple/apple_threading.cpp
index 7594c41a0..189ac3f05 100644
--- a/renderdoc/os/posix/apple/apple_threading.cpp
+++ b/renderdoc/os/posix/apple/apple_threading.cpp
@@ -33,7 +33,7 @@ double Timing::GetTickFrequency()
 
   uint64_t numer = timeInfo.numer;
   uint64_t denom = timeInfo.denom;
-  return ((double)numer / (double)denom) * 1000000.0;
+  return ((double)denom / (double)numer) * 1000000.0;
 }
 
 uint64_t Timing::GetTick()