diff --git a/configure.ac b/configure.ac
index 111b5bac0..493d9a43f 100644
--- a/configure.ac
+++ b/configure.ac
@@ -755,6 +755,7 @@ AM_COND_IF([DEBUG],
 ], [
 	CHARYBDIS_C_GCC_TRY_FLAGS([-Wmissing-noreturn], charybdis_cv_c_gcc_w_missing_noreturn)
 	CHARYBDIS_C_GCC_TRY_FLAGS([-Wno-unknown-attributes], charybdis_cv_c_gcc_w_unknown_attributes)
+	CHARYBDIS_C_GCC_TRY_FLAGS([-Wno-unknown-pragmas], charybdis_cv_c_gcc_w_unknown_pragmas)
 ])
 
 dnl