diff --git a/external/dtoa/C6011.patch.0 b/external/dtoa/C6011.patch.0
new file mode 100644
index 000000000000..a5e55e34f179
--- /dev/null
+++ b/external/dtoa/C6011.patch.0
@@ -0,0 +1,10 @@
+--- src/dtoa.c	2024-05-01 10:10:49.702762020 +0100
++++ src/dtoa.c	2024-05-01 10:11:45.308831303 +0100
+@@ -1606,6 +1606,7 @@
+ 		else
+ 			rv = (Bigint*)MALLOC(len*sizeof(double));
+ #endif
++		assert(rv && "Don't handle OOM conditions");
+ 		rv->k = k;
+ 		rv->maxwds = x;
+ 		}
diff --git a/external/dtoa/UnpackedTarball_dtoa.mk b/external/dtoa/UnpackedTarball_dtoa.mk
index bc4fe55b5a7e..d1702085cd6f 100644
--- a/external/dtoa/UnpackedTarball_dtoa.mk
+++ b/external/dtoa/UnpackedTarball_dtoa.mk
@@ -17,6 +17,7 @@ $(eval $(call gb_UnpackedTarball_add_patches,dtoa, \
     external/dtoa/include_header.patch \
     external/dtoa/coverity.patch \
     external/dtoa/ubsan.patch.0 \
+    external/dtoa/C6011.patch.0 \
 ))
 
 # vim: set noet sw=4 ts=4: