diff --git a/support/scripts/gen-bootlin-toolchains b/support/scripts/gen-bootlin-toolchains
index bfc7237d48..62cdb48478 100755
--- a/support/scripts/gen-bootlin-toolchains
+++ b/support/scripts/gen-bootlin-toolchains
@@ -244,12 +244,16 @@ class Toolchain:
             if frag.startswith("BR2_TOOLCHAIN_EXTERNAL_CUSTOM_UCLIBC"):
                 selects.append("BR2_TOOLCHAIN_EXTERNAL_UCLIBC")
             elif frag.startswith("BR2_TOOLCHAIN_EXTERNAL_CUSTOM_GLIBC"):
+                # glibc needs mmu support
+                depends.append("BR2_USE_MMU")
                 # glibc doesn't support static only configuration
                 depends.append("!BR2_STATIC_LIBS")
                 selects.append("BR2_TOOLCHAIN_EXTERNAL_GLIBC")
                 # all glibc toolchains have RPC support
                 selects.append("BR2_TOOLCHAIN_HAS_NATIVE_RPC")
             elif frag.startswith("BR2_TOOLCHAIN_EXTERNAL_CUSTOM_MUSL"):
+                # musl needs mmu support
+                depends.append("BR2_USE_MMU")
                 selects.append("BR2_TOOLCHAIN_EXTERNAL_MUSL")
 
             # gcc version