diff --git a/src/configure b/src/configure
index fda3a4fe9f..e0f5b99ba1 100755
--- a/src/configure
+++ b/src/configure
@@ -5967,6 +5967,22 @@ case $OS in
     if test "${enable_sdk}" != "" ; then
       PREFLAGS="$PREFLAGS -isysroot ${enable_sdk} -mmacosx-version-min=10.4 -DEXTRA_EXCEPTION_STUBS"
       LDFLAGS="$LDFLAGS -isysroot ${enable_sdk} -mmacosx-version-min=10.4"
+      if test "${CC}" = "gcc" ; then
+        CC=gcc-4.0
+      fi
+      if test "${CXX}" = "g++" ; then
+        CXX=g++-4.0
+      fi
+      if test "${CPP}" = "gcc -E" ; then
+        CPP="gcc-4.0 -E"
+      fi
+      if test "${CXXCPP}" = "g++ -E" ; then
+        CXXCPP="g++-4.0 -E"
+      fi
+      if test "${LD}" = "gcc" ; then
+        LD=gcc-4.0
+      fi
+      SUB_CONFIGURE_EXTRAS="${SUB_CONFIGURE_EXTRAS} CFLAGS="'"'"${CFLAGS} ${PREFLAGS}"'"'
     fi
 
     case `$UNAME -m` in
diff --git a/src/racket/configure.ac b/src/racket/configure.ac
index 7aeefe62ee..72c5ef8580 100644
--- a/src/racket/configure.ac
+++ b/src/racket/configure.ac
@@ -663,6 +663,22 @@ case $OS in
     if test "${enable_sdk}" != "" ; then 
       PREFLAGS="$PREFLAGS -isysroot ${enable_sdk} -mmacosx-version-min=10.4 -DEXTRA_EXCEPTION_STUBS"
       LDFLAGS="$LDFLAGS -isysroot ${enable_sdk} -mmacosx-version-min=10.4"
+      if test "${CC}" = "gcc" ; then
+        CC=gcc-4.0
+      fi
+      if test "${CXX}" = "g++" ; then
+        CXX=g++-4.0
+      fi
+      if test "${CPP}" = "gcc -E" ; then
+        CPP="gcc-4.0 -E"
+      fi
+      if test "${CXXCPP}" = "g++ -E" ; then
+        CXXCPP="g++-4.0 -E"
+      fi
+      if test "${LD}" = "gcc" ; then
+        LD=gcc-4.0
+      fi
+      SUB_CONFIGURE_EXTRAS="${SUB_CONFIGURE_EXTRAS} CFLAGS="'"'"${CFLAGS} ${PREFLAGS}"'"'
     fi
     
     case `$UNAME -m` in