diff --git a/CMake/PickyWarnings.cmake b/CMake/PickyWarnings.cmake
index 7838f6f8ba..b206381c0c 100644
--- a/CMake/PickyWarnings.cmake
+++ b/CMake/PickyWarnings.cmake
@@ -118,7 +118,7 @@ if(PICKY_COMPILER)
       -Wfloat-equal                        # clang  1.0  gcc  2.96 (3.0)
       -Wformat-security                    # clang  2.7  gcc  4.1
       -Wignored-qualifiers                 # clang  2.8  gcc  4.3
-      -Wmissing-field-initializers         # clang  2.7  gcc  4.1
+      -Werror=missing-field-initializers   # clang  2.7  gcc  4.1
       -Wmissing-noreturn                   # clang  2.7  gcc  4.1
       -Wno-format-nonliteral               # clang  1.0  gcc  2.96 (3.0)
       -Wno-sign-conversion                 # clang  2.9  gcc  4.3
diff --git a/m4/curl-compilers.m4 b/m4/curl-compilers.m4
index dc6d3aa4cf..704516a73f 100644
--- a/m4/curl-compilers.m4
+++ b/m4/curl-compilers.m4
@@ -825,7 +825,7 @@ AC_DEFUN([CURL_SET_COMPILER_WARNING_OPTS], [
             CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [conversion])
             CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [div-by-zero format-security])
             CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [empty-body])
-            CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [missing-field-initializers])
+            CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [error=missing-field-initializers])
             CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [missing-noreturn])
             CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [old-style-definition])
             CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [redundant-decls])