diff --git a/racket/src/cs/c/configure b/racket/src/cs/c/configure
index 486e502fda..18f6bab3ea 100755
--- a/racket/src/cs/c/configure
+++ b/racket/src/cs/c/configure
@@ -4352,7 +4352,7 @@ fi
 
 if test "$INCLUDEDEP" = "#" ; then
   is_gmake=`make -v no-such-target-we-hope 2>&1 | grep "GNU Make"`
-  if test "$is_gmake" = "" ; then
+  if test "$is_gmake" != "" ; then
      INCLUDEDEP="-include"
   fi
 fi
diff --git a/racket/src/cs/c/configure.ac b/racket/src/cs/c/configure.ac
index 1016d7a2d0..0147ca57ad 100644
--- a/racket/src/cs/c/configure.ac
+++ b/racket/src/cs/c/configure.ac
@@ -431,7 +431,7 @@ m4_include(../ac/ubsan.m4)
 
 if test "$INCLUDEDEP" = "#" ; then
   is_gmake=`make -v no-such-target-we-hope 2>&1 | grep "GNU Make"`
-  if test "$is_gmake" = "" ; then
+  if test "$is_gmake" != "" ; then
      INCLUDEDEP="-include"
   fi
 fi