diff --git a/src/libCom/osi/os/WIN32/epicsMath.h b/src/libCom/osi/os/WIN32/epicsMath.h
index f9c97dd42..da4a8a2c3 100644
--- a/src/libCom/osi/os/WIN32/epicsMath.h
+++ b/src/libCom/osi/os/WIN32/epicsMath.h
@@ -2,7 +2,7 @@
 #ifndef epicsMathh
 #define epicsMathh
 
-#include "float.h"
+#include <float.h>
 
 #define epicsIsNAN(D) _isnan(D)
 
diff --git a/src/libCom/osi/os/posix/epicsMath.h b/src/libCom/osi/os/posix/epicsMath.h
index ecc7b1173..bb8ce4fd8 100644
--- a/src/libCom/osi/os/posix/epicsMath.h
+++ b/src/libCom/osi/os/posix/epicsMath.h
@@ -2,7 +2,7 @@
 #ifndef epicsMathh
 #define epicsMathh
 
-#include "math.h"
+#include <math.h>
 
 #define epicsIsNAN(D) isnan(D)