diff --git a/docs/examples/Makefile.m32 b/docs/examples/Makefile.m32
index e75b6d1308..5fbc5d66ce 100644
--- a/docs/examples/Makefile.m32
+++ b/docs/examples/Makefile.m32
@@ -84,7 +84,7 @@ endif
 endif
 
 CC	= $(CROSSPREFIX)gcc
-CFLAGS	= -g -O2 -Wall
+CFLAGS	= -g -O2 -Wall -W
 CFLAGS	+= -fno-strict-aliasing
 ifeq ($(ARCH),w64)
 CFLAGS	+= -m64 -D_AMD64_
diff --git a/lib/Makefile.m32 b/lib/Makefile.m32
index 93bc18824a..8e4c703330 100644
--- a/lib/Makefile.m32
+++ b/lib/Makefile.m32
@@ -77,7 +77,7 @@ LIBCARES_PATH = $(PROOT)/ares
 endif
 
 CC	= $(CROSSPREFIX)gcc
-CFLAGS	= $(CURL_CFLAG_EXTRAS) -g -O2 -Wall
+CFLAGS	= $(CURL_CFLAG_EXTRAS) -g -O2 -Wall -W
 CFLAGS	+= -fno-strict-aliasing
 # comment LDFLAGS below to keep debug info
 LDFLAGS	= $(CURL_LDFLAG_EXTRAS) $(CURL_LDFLAG_EXTRAS_DLL) -s
diff --git a/src/Makefile.m32 b/src/Makefile.m32
index 40852e5730..315cd5cb38 100644
--- a/src/Makefile.m32
+++ b/src/Makefile.m32
@@ -89,7 +89,7 @@ LIBCARES_PATH = $(PROOT)/ares
 endif
 
 CC	= $(CROSSPREFIX)gcc
-CFLAGS	= $(CURL_CFLAG_EXTRAS) -g -O2 -Wall
+CFLAGS	= $(CURL_CFLAG_EXTRAS) -g -O2 -Wall -W
 CFLAGS	+= -fno-strict-aliasing
 # comment LDFLAGS below to keep debug info
 LDFLAGS	= $(CURL_LDFLAG_EXTRAS) $(CURL_LDFLAG_EXTRAS_EXE) -s