diff --git a/gvsbuild/patches/ffmpeg/build/build.sh b/gvsbuild/patches/ffmpeg/build/build.sh
index be3886e3e..208147b31 100644
--- a/gvsbuild/patches/ffmpeg/build/build.sh
+++ b/gvsbuild/patches/ffmpeg/build/build.sh
@@ -41,6 +41,8 @@ if [ "$build_type" = "debug" ]; then
     configure_cmd[idx++]="--enable-debug"
     # FIXME: the -Od and -Zi instructions are overriden in the compilation command
     configure_cmd[idx++]="--extra-cflags=\"-Od -Zi -MDd\""
+else
+    configure_cmd[idx++]="--extra-cflags=-MD"
 fi
 
 if [ "$enable_gpl" = "enable_gpl" ]; then
diff --git a/gvsbuild/patches/x264/build/build.sh b/gvsbuild/patches/x264/build/build.sh
index d70771278..e2cbb464a 100644
--- a/gvsbuild/patches/x264/build/build.sh
+++ b/gvsbuild/patches/x264/build/build.sh
@@ -14,6 +14,8 @@ configure_cmd[idx++]="--extra-cflags=-DNO_PREFIX"
 if [ "$build_type" = "debug" ]; then
     configure_cmd[idx++]="--enable-debug"
     configure_cmd[idx++]="--extra-cflags=-MDd -Od -Zi"
+else
+    configure_cmd[idx++]="--extra-cflags=-MD"
 fi
 
 if [ "$build_type" = "debug-optimized" ]; then