diff --git a/src/libCom/osi/compiler/gcc/epicsAtomicCD.h b/src/libCom/osi/compiler/gcc/epicsAtomicCD.h
index f725a23cb..c2b32557c 100644
--- a/src/libCom/osi/compiler/gcc/epicsAtomicCD.h
+++ b/src/libCom/osi/compiler/gcc/epicsAtomicCD.h
@@ -34,9 +34,13 @@
     GCC_ATOMIC_CONCAT ( \
         __GCC_HAVE_SYNC_COMPARE_AND_SWAP_, \
         __SIZEOF_SIZE_T__ )
+        
+#define GCC_ATOMIC_INTRINSICS_AVAIL_EARLIER \
+    defined ( __i386 ) && ( __GNUC__ * 100 + __GNUC_MINOR__ ) >= 401
 
-#if GCC_ATOMIC_INTRINSICS_AVAIL_UINT_T \
-    && defined GCC_ATOMIC_INTRINSICS_AVAIL_SIZE_T
+#if ( GCC_ATOMIC_INTRINSICS_AVAIL_UINT_T \
+    && GCC_ATOMIC_INTRINSICS_AVAIL_SIZE_T ) \
+    || GCC_ATOMIC_INTRINSICS_AVAIL_EARLIER
 
 #define OSD_ATOMIC_GCC