This study examines the durational and spectral correlates of word boundaries with pseudo-word sequences. The productions from one female native French speaker were extracted from short sentence contexts that induced two lexical segmentations of the same phonemic strings, either a word-final enchaînement consonant (CCV1Cp#V2CV) or a word-initial consonant (CCV1#CpV2CV). Longer durations and lower F1 were observed for V1 in CCV1Cp#V2CV. Similarly, longer durations were found for Cp and V2 when corresponding to word onset. Thus, phonetic cues to lexical segmentation are available in the signal, even for non-word constituents. Although the perceptual influence of these subtle cues remains to be demonstrated, the findings are consistent with a syllable- based segmentation heuristic that could be guided by such lexical structure cues to avoid missegmentations.