diff --git a/src/testdrive.F90 b/src/testdrive.F90
index a63196c..38b8c0d 100644
--- a/src/testdrive.F90
+++ b/src/testdrive.F90
@@ -13,7 +13,7 @@
 
 !# Enable support for quadruple precision
 #ifndef WITH_QP
-#define WITH_QP 1
+#define WITH_QP 0
 #endif
 
 !# Enable support for extended double precision
diff --git a/test/test_check.F90 b/test/test_check.F90
index ca47a55..2bee139 100644
--- a/test/test_check.F90
+++ b/test/test_check.F90
@@ -13,7 +13,7 @@
 
 !# Enable support for quadruple precision
 #ifndef WITH_QP
-#define WITH_QP 1
+#define WITH_QP 0
 #endif
 
 !# Enable support for extended double precision