diff --git a/mingw-w64-libraries/pseh/Makefile.am b/mingw-w64-libraries/pseh/Makefile.am
index 69a75fd..8930e68 100644
--- a/mingw-w64-libraries/pseh/Makefile.am
+++ b/mingw-w64-libraries/pseh/Makefile.am
@@ -1,7 +1,7 @@
 AUTOMAKE_OPTIONS = foreign subdir-objects
 
 AM_CPPFLAGS = -I$(srcdir)/include
-AM_CFLAGS = -Wall -Wstrict-aliasing=2
+AM_CFLAGS = -Wall -Wstrict-aliasing=2 -pedantic
 
 lib_LIBRARIES = libpseh.a
 
diff --git a/mingw-w64-libraries/pseh/Makefile.in b/mingw-w64-libraries/pseh/Makefile.in
index e8e974e..5b5bc92 100644
--- a/mingw-w64-libraries/pseh/Makefile.in
+++ b/mingw-w64-libraries/pseh/Makefile.in
@@ -209,7 +209,7 @@
 top_srcdir = @top_srcdir@
 AUTOMAKE_OPTIONS = foreign subdir-objects
 AM_CPPFLAGS = -I$(srcdir)/include
-AM_CFLAGS = -Wall -Wstrict-aliasing=2
+AM_CFLAGS = -Wall -Wstrict-aliasing=2 -pedantic
 lib_LIBRARIES = libpseh.a
 libpseh_a_SOURCES = \
   src/framebased.c \