diff --git a/devel/sdl/Makefile b/devel/sdl/Makefile
index a86a566db247..308ed4c1bafd 100644
--- a/devel/sdl/Makefile
+++ b/devel/sdl/Makefile
@@ -23,7 +23,9 @@ USE_XLIB=	yes
 USE_ESOUND=	yes
 INSTALLS_SHLIB=	yes
 USE_LIBTOOL=	yes
-CONFIGURE_ENV=	NASM="${LOCALBASE}/bin/nasm"
+CONFIGURE_ENV=	NASM="${LOCALBASE}/bin/nasm" \
+		PTHREAD_CFLAGS="${PTHREAD_CFLAGS}" \
+		PTHREAD_LIBS="${PTHREAD_LIBS}"
 CONFIGURE_ARGS=	--enable-video-svga
 
 CFLAGS+=	${PTHREAD_CFLAGS}
diff --git a/devel/sdl/files/patch-ac b/devel/sdl/files/patch-ac
index 27e4f11aaa02..3806f37749de 100644
--- a/devel/sdl/files/patch-ac
+++ b/devel/sdl/files/patch-ac
@@ -1,5 +1,8 @@
+
+$FreeBSD$
+
 --- configure.orig	Sat Mar  4 04:58:00 2000
-+++ configure	Thu Aug 31 18:43:39 2000
++++ configure	Fri Mar 30 17:04:33 2001
 @@ -604,9 +604,9 @@
  
  # libtool versioning
@@ -26,7 +29,7 @@
      case "$target" in
          *-*-freebsd*)
 -            pthread_lib="-lc_r"
-+            pthread_lib="-pthread"
++            pthread_lib="${PTHREAD_LIBS}"
              ;;
          *-*-openbsd*)
              pthread_lib="-lc_r"
@@ -35,7 +38,7 @@
          if test x$use_pthreads = xyes; then
              CFLAGS="$CFLAGS -D_REENTRANT -DSDL_USE_PTHREADS"
 -            SDL_CFLAGS="$SDL_CFLAGS -D_REENTRANT"
-+            SDL_CFLAGS="$SDL_CFLAGS -D_REENTRANT -D_THREAD_SAFE"
++            SDL_CFLAGS="$SDL_CFLAGS -D_REENTRANT ${PTHREAD_CFLAGS}"
              SDL_LIBS="$SDL_LIBS $pthread_lib"
          fi
      fi
diff --git a/devel/sdl10/Makefile b/devel/sdl10/Makefile
index a86a566db247..308ed4c1bafd 100644
--- a/devel/sdl10/Makefile
+++ b/devel/sdl10/Makefile
@@ -23,7 +23,9 @@ USE_XLIB=	yes
 USE_ESOUND=	yes
 INSTALLS_SHLIB=	yes
 USE_LIBTOOL=	yes
-CONFIGURE_ENV=	NASM="${LOCALBASE}/bin/nasm"
+CONFIGURE_ENV=	NASM="${LOCALBASE}/bin/nasm" \
+		PTHREAD_CFLAGS="${PTHREAD_CFLAGS}" \
+		PTHREAD_LIBS="${PTHREAD_LIBS}"
 CONFIGURE_ARGS=	--enable-video-svga
 
 CFLAGS+=	${PTHREAD_CFLAGS}
diff --git a/devel/sdl10/files/patch-ac b/devel/sdl10/files/patch-ac
index 27e4f11aaa02..3806f37749de 100644
--- a/devel/sdl10/files/patch-ac
+++ b/devel/sdl10/files/patch-ac
@@ -1,5 +1,8 @@
+
+$FreeBSD$
+
 --- configure.orig	Sat Mar  4 04:58:00 2000
-+++ configure	Thu Aug 31 18:43:39 2000
++++ configure	Fri Mar 30 17:04:33 2001
 @@ -604,9 +604,9 @@
  
  # libtool versioning
@@ -26,7 +29,7 @@
      case "$target" in
          *-*-freebsd*)
 -            pthread_lib="-lc_r"
-+            pthread_lib="-pthread"
++            pthread_lib="${PTHREAD_LIBS}"
              ;;
          *-*-openbsd*)
              pthread_lib="-lc_r"
@@ -35,7 +38,7 @@
          if test x$use_pthreads = xyes; then
              CFLAGS="$CFLAGS -D_REENTRANT -DSDL_USE_PTHREADS"
 -            SDL_CFLAGS="$SDL_CFLAGS -D_REENTRANT"
-+            SDL_CFLAGS="$SDL_CFLAGS -D_REENTRANT -D_THREAD_SAFE"
++            SDL_CFLAGS="$SDL_CFLAGS -D_REENTRANT ${PTHREAD_CFLAGS}"
              SDL_LIBS="$SDL_LIBS $pthread_lib"
          fi
      fi