diff --git a/build/jam/BuildSetup b/build/jam/BuildSetup
index 4fa705d8c0..1896f2a352 100644
--- a/build/jam/BuildSetup
+++ b/build/jam/BuildSetup
@@ -156,6 +156,12 @@ if $(HAIKU_USE_GCC_PIPE) = 1 {
 	HAIKU_GCC_BASE_FLAGS = -pipe ;
 }
 
+# disable strict aliasing on anything newer than gcc 2 as it may lead to unexpected results.
+# TODO: remove this when all code has been analyzed/fixed with regard to aliasing.
+if $(HAIKU_GCC_VERSION[1]) >= 3 {
+	HAIKU_GCC_BASE_FLAGS += -fno-strict-aliasing ;
+}
+
 # override gcc 2.95.3's header directory -- strictly necessary only when using
 # the BeOS native compiler (since its headers are incompatible), but it doesn't
 # harm for the cross-compiler either.